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llvm/test/CodeGen/X86/StackColoring.ll

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aad/fix labels in test/CodeGen/X86/StackColoring.ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240744 91177308-0d34-0410-b5e6-96231b3b80d8
2015-06-26 00:26:44 +00:00
; RUN: llc -mcpu=corei7 -no-stack-coloring=false < %s | FileCheck %s --check-prefix=YESCOLOR --check-prefix=CHECK
; RUN: llc -mcpu=corei7 -no-stack-coloring=true < %s | FileCheck %s --check-prefix=NOCOLOR --check-prefix=CHECK
Add a new optimization pass: Stack Coloring, that merges disjoint static allocations (allocas). Allocas are known to be disjoint if they are marked by disjoint lifetime markers (@llvm.lifetime.XXX intrinsics). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163299 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-06 09:17:37 +00:00
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx10.8.0"
aad/fix labels in test/CodeGen/X86/StackColoring.ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240744 91177308-0d34-0410-b5e6-96231b3b80d8
2015-06-26 00:26:44 +00:00
;CHECK-LABEL: myCall_w2:
Enable MI Sched for x86. This changes the SelectionDAG scheduling preference to source order. Soon, the SelectionDAG scheduler can be bypassed saving a nice chunk of compile time. Performance differences that result from this change are often a consequence of register coalescing. The register coalescer is far from perfect. Bugs can be filed for deficiencies. On x86 SandyBridge/Haswell, the source order schedule is often preserved, particularly for small blocks. Register pressure is generally improved over the SD scheduler's ILP mode. However, we are still able to handle large blocks that require latency hiding, unlike the SD scheduler's BURR mode. MI scheduler also attempts to discover the critical path in single-block loops and adjust heuristics accordingly. The MI scheduler relies on the new machine model. This is currently unimplemented for AVX, so we may not be generating the best code yet. Unit tests are updated so they don't depend on SD scheduling heuristics. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192750 91177308-0d34-0410-b5e6-96231b3b80d8
2013-10-15 23:33:07 +00:00
;YESCOLOR: subq $144, %rsp
;NOCOLOR: subq $272, %rsp
Add a new optimization pass: Stack Coloring, that merges disjoint static allocations (allocas). Allocas are known to be disjoint if they are marked by disjoint lifetime markers (@llvm.lifetime.XXX intrinsics). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163299 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-06 09:17:37 +00:00
define i32 @myCall_w2(i32 %in) {
entry:
%a = alloca [17 x i8*], align 8
%a2 = alloca [16 x i8*], align 8
%b = bitcast [17 x i8*]* %a to i8*
%b2 = bitcast [16 x i8*]* %a2 to i8*
call void @llvm.lifetime.start(i64 -1, i8* %b)
%t1 = call i32 @foo(i32 %in, i8* %b)
%t2 = call i32 @foo(i32 %in, i8* %b)
call void @llvm.lifetime.end(i64 -1, i8* %b)
call void @llvm.lifetime.start(i64 -1, i8* %b2)
%t3 = call i32 @foo(i32 %in, i8* %b2)
%t4 = call i32 @foo(i32 %in, i8* %b2)
call void @llvm.lifetime.end(i64 -1, i8* %b2)
%t5 = add i32 %t1, %t2
%t6 = add i32 %t3, %t4
%t7 = add i32 %t5, %t6
ret i32 %t7
}
aad/fix labels in test/CodeGen/X86/StackColoring.ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240744 91177308-0d34-0410-b5e6-96231b3b80d8
2015-06-26 00:26:44 +00:00
;CHECK-LABEL: myCall2_no_merge
Add a new optimization pass: Stack Coloring, that merges disjoint static allocations (allocas). Allocas are known to be disjoint if they are marked by disjoint lifetime markers (@llvm.lifetime.XXX intrinsics). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163299 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-06 09:17:37 +00:00
;YESCOLOR: subq $272, %rsp
;NOCOLOR: subq $272, %rsp
define i32 @myCall2_no_merge(i32 %in, i1 %d) {
entry:
%a = alloca [17 x i8*], align 8
%a2 = alloca [16 x i8*], align 8
%b = bitcast [17 x i8*]* %a to i8*
%b2 = bitcast [16 x i8*]* %a2 to i8*
call void @llvm.lifetime.start(i64 -1, i8* %b)
%t1 = call i32 @foo(i32 %in, i8* %b)
%t2 = call i32 @foo(i32 %in, i8* %b)
br i1 %d, label %bb2, label %bb3
bb2:
call void @llvm.lifetime.start(i64 -1, i8* %b2)
%t3 = call i32 @foo(i32 %in, i8* %b2)
%t4 = call i32 @foo(i32 %in, i8* %b2)
call void @llvm.lifetime.end(i64 -1, i8* %b2)
%t5 = add i32 %t1, %t2
%t6 = add i32 %t3, %t4
%t7 = add i32 %t5, %t6
call void @llvm.lifetime.end(i64 -1, i8* %b)
ret i32 %t7
bb3:
call void @llvm.lifetime.end(i64 -1, i8* %b)
ret i32 0
}
aad/fix labels in test/CodeGen/X86/StackColoring.ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240744 91177308-0d34-0410-b5e6-96231b3b80d8
2015-06-26 00:26:44 +00:00
;CHECK-LABEL: myCall2_w2
Add a new optimization pass: Stack Coloring, that merges disjoint static allocations (allocas). Allocas are known to be disjoint if they are marked by disjoint lifetime markers (@llvm.lifetime.XXX intrinsics). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163299 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-06 09:17:37 +00:00
;YESCOLOR: subq $144, %rsp
;NOCOLOR: subq $272, %rsp
define i32 @myCall2_w2(i32 %in, i1 %d) {
entry:
%a = alloca [17 x i8*], align 8
%a2 = alloca [16 x i8*], align 8
%b = bitcast [17 x i8*]* %a to i8*
%b2 = bitcast [16 x i8*]* %a2 to i8*
call void @llvm.lifetime.start(i64 -1, i8* %b)
%t1 = call i32 @foo(i32 %in, i8* %b)
%t2 = call i32 @foo(i32 %in, i8* %b)
call void @llvm.lifetime.end(i64 -1, i8* %b)
br i1 %d, label %bb2, label %bb3
bb2:
call void @llvm.lifetime.start(i64 -1, i8* %b2)
%t3 = call i32 @foo(i32 %in, i8* %b2)
%t4 = call i32 @foo(i32 %in, i8* %b2)
call void @llvm.lifetime.end(i64 -1, i8* %b2)
%t5 = add i32 %t1, %t2
%t6 = add i32 %t3, %t4
%t7 = add i32 %t5, %t6
ret i32 %t7
bb3:
ret i32 0
}
aad/fix labels in test/CodeGen/X86/StackColoring.ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240744 91177308-0d34-0410-b5e6-96231b3b80d8
2015-06-26 00:26:44 +00:00
;CHECK-LABEL: myCall_w4:
Allocate local registers in order for optimal coloring. Also avoid locals evicting locals just because they want a cheaper register. Problem: MI Sched knows exactly how many registers we have and assumes they can be colored. In cases where we have large blocks, usually from unrolled loops, greedy coloring fails. This is a source of "regressions" from the MI Scheduler on x86. I noticed this issue on x86 where we have long chains of two-address defs in the same live range. It's easy to see this in matrix multiplication benchmarks like IRSmk and even the unit test misched-matmul.ll. A fundamental difference between the LLVM register allocator and conventional graph coloring is that in our model a live range can't discover its neighbors, it can only verify its neighbors. That's why we initially went for greedy coloring and added eviction to deal with the hard cases. However, for singly defined and two-address live ranges, we can optimally color without visiting neighbors simply by processing the live ranges in instruction order. Other beneficial side effects: It is much easier to understand and debug regalloc for large blocks when the live ranges are allocated in order. Yes, global allocation is still very confusing, but it's nice to be able to comprehend what happened locally. Heuristics could be added to bias register assignment based on instruction locality (think late register pairing, banks...). Intuituvely this will make some test cases that are on the threshold of register pressure more stable. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187139 91177308-0d34-0410-b5e6-96231b3b80d8
2013-07-25 18:35:14 +00:00
;YESCOLOR: subq $200, %rsp
;NOCOLOR: subq $408, %rsp
Add a new optimization pass: Stack Coloring, that merges disjoint static allocations (allocas). Allocas are known to be disjoint if they are marked by disjoint lifetime markers (@llvm.lifetime.XXX intrinsics). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163299 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-06 09:17:37 +00:00
define i32 @myCall_w4(i32 %in) {
entry:
%a1 = alloca [14 x i8*], align 8
%a2 = alloca [13 x i8*], align 8
%a3 = alloca [12 x i8*], align 8
%a4 = alloca [11 x i8*], align 8
%b1 = bitcast [14 x i8*]* %a1 to i8*
%b2 = bitcast [13 x i8*]* %a2 to i8*
%b3 = bitcast [12 x i8*]* %a3 to i8*
%b4 = bitcast [11 x i8*]* %a4 to i8*
call void @llvm.lifetime.start(i64 -1, i8* %b4)
call void @llvm.lifetime.start(i64 -1, i8* %b1)
%t1 = call i32 @foo(i32 %in, i8* %b1)
%t2 = call i32 @foo(i32 %in, i8* %b1)
call void @llvm.lifetime.end(i64 -1, i8* %b1)
call void @llvm.lifetime.start(i64 -1, i8* %b2)
%t9 = call i32 @foo(i32 %in, i8* %b2)
%t8 = call i32 @foo(i32 %in, i8* %b2)
call void @llvm.lifetime.end(i64 -1, i8* %b2)
call void @llvm.lifetime.start(i64 -1, i8* %b3)
%t3 = call i32 @foo(i32 %in, i8* %b3)
%t4 = call i32 @foo(i32 %in, i8* %b3)
call void @llvm.lifetime.end(i64 -1, i8* %b3)
%t11 = call i32 @foo(i32 %in, i8* %b4)
call void @llvm.lifetime.end(i64 -1, i8* %b4)
%t5 = add i32 %t1, %t2
%t6 = add i32 %t3, %t4
%t7 = add i32 %t5, %t6
ret i32 %t7
}
aad/fix labels in test/CodeGen/X86/StackColoring.ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240744 91177308-0d34-0410-b5e6-96231b3b80d8
2015-06-26 00:26:44 +00:00
;CHECK-LABEL: myCall2_w4:
Add a new optimization pass: Stack Coloring, that merges disjoint static allocations (allocas). Allocas are known to be disjoint if they are marked by disjoint lifetime markers (@llvm.lifetime.XXX intrinsics). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163299 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-06 09:17:37 +00:00
;YESCOLOR: subq $112, %rsp
;NOCOLOR: subq $400, %rsp
define i32 @myCall2_w4(i32 %in) {
entry:
%a1 = alloca [14 x i8*], align 8
%a2 = alloca [13 x i8*], align 8
%a3 = alloca [12 x i8*], align 8
%a4 = alloca [11 x i8*], align 8
%b1 = bitcast [14 x i8*]* %a1 to i8*
%b2 = bitcast [13 x i8*]* %a2 to i8*
%b3 = bitcast [12 x i8*]* %a3 to i8*
%b4 = bitcast [11 x i8*]* %a4 to i8*
call void @llvm.lifetime.start(i64 -1, i8* %b1)
%t1 = call i32 @foo(i32 %in, i8* %b1)
%t2 = call i32 @foo(i32 %in, i8* %b1)
call void @llvm.lifetime.end(i64 -1, i8* %b1)
call void @llvm.lifetime.start(i64 -1, i8* %b2)
%t9 = call i32 @foo(i32 %in, i8* %b2)
%t8 = call i32 @foo(i32 %in, i8* %b2)
call void @llvm.lifetime.end(i64 -1, i8* %b2)
call void @llvm.lifetime.start(i64 -1, i8* %b3)
%t3 = call i32 @foo(i32 %in, i8* %b3)
%t4 = call i32 @foo(i32 %in, i8* %b3)
call void @llvm.lifetime.end(i64 -1, i8* %b3)
br i1 undef, label %bb2, label %bb3
bb2:
call void @llvm.lifetime.start(i64 -1, i8* %b4)
%t11 = call i32 @foo(i32 %in, i8* %b4)
call void @llvm.lifetime.end(i64 -1, i8* %b4)
%t5 = add i32 %t1, %t2
%t6 = add i32 %t3, %t4
%t7 = add i32 %t5, %t6
ret i32 %t7
bb3:
ret i32 0
}
aad/fix labels in test/CodeGen/X86/StackColoring.ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240744 91177308-0d34-0410-b5e6-96231b3b80d8
2015-06-26 00:26:44 +00:00
;CHECK-LABEL: myCall2_noend:
Add a new optimization pass: Stack Coloring, that merges disjoint static allocations (allocas). Allocas are known to be disjoint if they are marked by disjoint lifetime markers (@llvm.lifetime.XXX intrinsics). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163299 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-06 09:17:37 +00:00
;YESCOLOR: subq $144, %rsp
;NOCOLOR: subq $272, %rsp
define i32 @myCall2_noend(i32 %in, i1 %d) {
entry:
%a = alloca [17 x i8*], align 8
%a2 = alloca [16 x i8*], align 8
%b = bitcast [17 x i8*]* %a to i8*
%b2 = bitcast [16 x i8*]* %a2 to i8*
call void @llvm.lifetime.start(i64 -1, i8* %b)
%t1 = call i32 @foo(i32 %in, i8* %b)
%t2 = call i32 @foo(i32 %in, i8* %b)
call void @llvm.lifetime.end(i64 -1, i8* %b)
br i1 %d, label %bb2, label %bb3
bb2:
call void @llvm.lifetime.start(i64 -1, i8* %b2)
%t3 = call i32 @foo(i32 %in, i8* %b2)
%t4 = call i32 @foo(i32 %in, i8* %b2)
%t5 = add i32 %t1, %t2
%t6 = add i32 %t3, %t4
%t7 = add i32 %t5, %t6
ret i32 %t7
bb3:
ret i32 0
}
aad/fix labels in test/CodeGen/X86/StackColoring.ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240744 91177308-0d34-0410-b5e6-96231b3b80d8
2015-06-26 00:26:44 +00:00
;CHECK-LABEL: myCall2_noend2:
Add a new optimization pass: Stack Coloring, that merges disjoint static allocations (allocas). Allocas are known to be disjoint if they are marked by disjoint lifetime markers (@llvm.lifetime.XXX intrinsics). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163299 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-06 09:17:37 +00:00
;YESCOLOR: subq $144, %rsp
;NOCOLOR: subq $272, %rsp
define i32 @myCall2_noend2(i32 %in, i1 %d) {
entry:
%a = alloca [17 x i8*], align 8
%a2 = alloca [16 x i8*], align 8
%b = bitcast [17 x i8*]* %a to i8*
%b2 = bitcast [16 x i8*]* %a2 to i8*
call void @llvm.lifetime.start(i64 -1, i8* %b)
%t1 = call i32 @foo(i32 %in, i8* %b)
%t2 = call i32 @foo(i32 %in, i8* %b)
br i1 %d, label %bb2, label %bb3
bb2:
call void @llvm.lifetime.end(i64 -1, i8* %b)
call void @llvm.lifetime.start(i64 -1, i8* %b2)
%t3 = call i32 @foo(i32 %in, i8* %b2)
%t4 = call i32 @foo(i32 %in, i8* %b2)
%t5 = add i32 %t1, %t2
%t6 = add i32 %t3, %t4
%t7 = add i32 %t5, %t6
ret i32 %t7
bb3:
ret i32 0
}
aad/fix labels in test/CodeGen/X86/StackColoring.ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240744 91177308-0d34-0410-b5e6-96231b3b80d8
2015-06-26 00:26:44 +00:00
;CHECK-LABEL: myCall2_nostart:
Add a new optimization pass: Stack Coloring, that merges disjoint static allocations (allocas). Allocas are known to be disjoint if they are marked by disjoint lifetime markers (@llvm.lifetime.XXX intrinsics). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163299 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-06 09:17:37 +00:00
;YESCOLOR: subq $144, %rsp
;NOCOLOR: subq $272, %rsp
define i32 @myCall2_nostart(i32 %in, i1 %d) {
entry:
%a = alloca [17 x i8*], align 8
%a2 = alloca [16 x i8*], align 8
%b = bitcast [17 x i8*]* %a to i8*
%b2 = bitcast [16 x i8*]* %a2 to i8*
%t1 = call i32 @foo(i32 %in, i8* %b)
%t2 = call i32 @foo(i32 %in, i8* %b)
call void @llvm.lifetime.end(i64 -1, i8* %b)
br i1 %d, label %bb2, label %bb3
bb2:
call void @llvm.lifetime.start(i64 -1, i8* %b2)
%t3 = call i32 @foo(i32 %in, i8* %b2)
%t4 = call i32 @foo(i32 %in, i8* %b2)
%t5 = add i32 %t1, %t2
%t6 = add i32 %t3, %t4
%t7 = add i32 %t5, %t6
ret i32 %t7
bb3:
ret i32 0
}
; Adopt the test from Transforms/Inline/array_merge.ll'
aad/fix labels in test/CodeGen/X86/StackColoring.ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240744 91177308-0d34-0410-b5e6-96231b3b80d8
2015-06-26 00:26:44 +00:00
;CHECK-LABEL: array_merge:
Add a new optimization pass: Stack Coloring, that merges disjoint static allocations (allocas). Allocas are known to be disjoint if they are marked by disjoint lifetime markers (@llvm.lifetime.XXX intrinsics). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163299 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-06 09:17:37 +00:00
;YESCOLOR: subq $816, %rsp
;NOCOLOR: subq $1616, %rsp
define void @array_merge() nounwind ssp {
entry:
%A.i1 = alloca [100 x i32], align 4
%B.i2 = alloca [100 x i32], align 4
%A.i = alloca [100 x i32], align 4
%B.i = alloca [100 x i32], align 4
%0 = bitcast [100 x i32]* %A.i to i8*
call void @llvm.lifetime.start(i64 -1, i8* %0) nounwind
%1 = bitcast [100 x i32]* %B.i to i8*
call void @llvm.lifetime.start(i64 -1, i8* %1) nounwind
call void @bar([100 x i32]* %A.i, [100 x i32]* %B.i) nounwind
call void @llvm.lifetime.end(i64 -1, i8* %0) nounwind
call void @llvm.lifetime.end(i64 -1, i8* %1) nounwind
%2 = bitcast [100 x i32]* %A.i1 to i8*
call void @llvm.lifetime.start(i64 -1, i8* %2) nounwind
%3 = bitcast [100 x i32]* %B.i2 to i8*
call void @llvm.lifetime.start(i64 -1, i8* %3) nounwind
call void @bar([100 x i32]* %A.i1, [100 x i32]* %B.i2) nounwind
call void @llvm.lifetime.end(i64 -1, i8* %2) nounwind
call void @llvm.lifetime.end(i64 -1, i8* %3) nounwind
ret void
}
aad/fix labels in test/CodeGen/X86/StackColoring.ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240744 91177308-0d34-0410-b5e6-96231b3b80d8
2015-06-26 00:26:44 +00:00
;CHECK-LABEL: func_phi_lifetime:
Teach the DAGBuilder about lifetime markers which are generated from PHINodes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163494 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-10 08:43:23 +00:00
;YESCOLOR: subq $272, %rsp
;NOCOLOR: subq $272, %rsp
define i32 @func_phi_lifetime(i32 %in, i1 %d) {
entry:
%a = alloca [17 x i8*], align 8
%a2 = alloca [16 x i8*], align 8
%b = bitcast [17 x i8*]* %a to i8*
%b2 = bitcast [16 x i8*]* %a2 to i8*
%t1 = call i32 @foo(i32 %in, i8* %b)
%t2 = call i32 @foo(i32 %in, i8* %b)
call void @llvm.lifetime.end(i64 -1, i8* %b)
br i1 %d, label %bb0, label %bb1
bb0:
%I1 = bitcast [17 x i8*]* %a to i8*
br label %bb2
bb1:
%I2 = bitcast [16 x i8*]* %a2 to i8*
br label %bb2
bb2:
%split = phi i8* [ %I1, %bb0 ], [ %I2, %bb1 ]
call void @llvm.lifetime.start(i64 -1, i8* %split)
%t3 = call i32 @foo(i32 %in, i8* %b2)
%t4 = call i32 @foo(i32 %in, i8* %b2)
%t5 = add i32 %t1, %t2
%t6 = add i32 %t3, %t4
%t7 = add i32 %t5, %t6
call void @llvm.lifetime.end(i64 -1, i8* %split)
ret i32 %t7
bb3:
ret i32 0
}
Stack Coloring: Add support for multiple regions of the same slot, within a single basic block. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163507 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-10 12:39:35 +00:00
aad/fix labels in test/CodeGen/X86/StackColoring.ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240744 91177308-0d34-0410-b5e6-96231b3b80d8
2015-06-26 00:26:44 +00:00
;CHECK-LABEL: multi_region_bb:
Stack Coloring: Add support for multiple regions of the same slot, within a single basic block. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163507 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-10 12:39:35 +00:00
define void @multi_region_bb() nounwind ssp {
entry:
%A.i1 = alloca [100 x i32], align 4
%B.i2 = alloca [100 x i32], align 4
%A.i = alloca [100 x i32], align 4
%B.i = alloca [100 x i32], align 4
%0 = bitcast [100 x i32]* %A.i to i8*
call void @llvm.lifetime.start(i64 -1, i8* %0) nounwind ; <---- start #1
%1 = bitcast [100 x i32]* %B.i to i8*
call void @llvm.lifetime.start(i64 -1, i8* %1) nounwind
call void @bar([100 x i32]* %A.i, [100 x i32]* %B.i) nounwind
call void @llvm.lifetime.end(i64 -1, i8* %0) nounwind
call void @llvm.lifetime.end(i64 -1, i8* %1) nounwind
%2 = bitcast [100 x i32]* %A.i1 to i8*
call void @llvm.lifetime.start(i64 -1, i8* %2) nounwind
%3 = bitcast [100 x i32]* %B.i2 to i8*
call void @llvm.lifetime.start(i64 -1, i8* %3) nounwind
call void @llvm.lifetime.start(i64 -1, i8* %0) nounwind ; <---- start #2
call void @bar([100 x i32]* %A.i1, [100 x i32]* %B.i2) nounwind
call void @llvm.lifetime.end(i64 -1, i8* %2) nounwind
call void @llvm.lifetime.end(i64 -1, i8* %0) nounwind
call void @llvm.lifetime.end(i64 -1, i8* %3) nounwind
ret void
}
Stack Coloring: Handle the case where END markers come before BEGIN markers properly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163530 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-10 18:51:09 +00:00
;YESCOLOR: subq $272, %rsp
;NOCOLOR: subq $272, %rsp
aad/fix labels in test/CodeGen/X86/StackColoring.ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240744 91177308-0d34-0410-b5e6-96231b3b80d8
2015-06-26 00:26:44 +00:00
Stack Coloring: Handle the case where END markers come before BEGIN markers properly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163530 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-10 18:51:09 +00:00
define i32 @myCall_end_before_begin(i32 %in, i1 %d) {
entry:
%a = alloca [17 x i8*], align 8
%a2 = alloca [16 x i8*], align 8
%b = bitcast [17 x i8*]* %a to i8*
%b2 = bitcast [16 x i8*]* %a2 to i8*
%t1 = call i32 @foo(i32 %in, i8* %b)
%t2 = call i32 @foo(i32 %in, i8* %b)
call void @llvm.lifetime.end(i64 -1, i8* %b)
call void @llvm.lifetime.start(i64 -1, i8* %b)
br i1 %d, label %bb2, label %bb3
bb2:
call void @llvm.lifetime.start(i64 -1, i8* %b2)
%t3 = call i32 @foo(i32 %in, i8* %b2)
%t4 = call i32 @foo(i32 %in, i8* %b2)
%t5 = add i32 %t1, %t2
%t6 = add i32 %t3, %t4
%t7 = add i32 %t5, %t6
ret i32 %t7
bb3:
ret i32 0
}
Fix miscompile due to StackColoring incorrectly merging stack slots (PR15707) IR optimisation passes can result in a basic block that contains: llvm.lifetime.start(%buf) ... llvm.lifetime.end(%buf) ... llvm.lifetime.start(%buf) Before this change, calculateLiveIntervals() was ignoring the second lifetime.start() and was regarding %buf as being dead from the lifetime.end() through to the end of the basic block. This can cause StackColoring to incorrectly merge %buf with another stack slot. Fix by removing the incorrect Starts[pos].isValid() and Finishes[pos].isValid() checks. Just doing: Starts[pos] = Indexes->getMBBStartIdx(MBB); Finishes[pos] = Indexes->getMBBEndIdx(MBB); unconditionally would be enough to fix the bug, but it causes some test failures due to stack slots not being merged when they were before. So, in order to keep the existing tests passing, treat LiveIn and LiveOut separately rather than approximating the live ranges by merging LiveIn and LiveOut. This fixes PR15707. Patch by Mark Seaborn. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181922 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-15 21:15:09 +00:00
; Regression test for PR15707. %buf1 and %buf2 should not be merged
; in this test case.
aad/fix labels in test/CodeGen/X86/StackColoring.ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240744 91177308-0d34-0410-b5e6-96231b3b80d8
2015-06-26 00:26:44 +00:00
;CHECK-LABEL: myCall_pr15707:
Fix miscompile due to StackColoring incorrectly merging stack slots (PR15707) IR optimisation passes can result in a basic block that contains: llvm.lifetime.start(%buf) ... llvm.lifetime.end(%buf) ... llvm.lifetime.start(%buf) Before this change, calculateLiveIntervals() was ignoring the second lifetime.start() and was regarding %buf as being dead from the lifetime.end() through to the end of the basic block. This can cause StackColoring to incorrectly merge %buf with another stack slot. Fix by removing the incorrect Starts[pos].isValid() and Finishes[pos].isValid() checks. Just doing: Starts[pos] = Indexes->getMBBStartIdx(MBB); Finishes[pos] = Indexes->getMBBEndIdx(MBB); unconditionally would be enough to fix the bug, but it causes some test failures due to stack slots not being merged when they were before. So, in order to keep the existing tests passing, treat LiveIn and LiveOut separately rather than approximating the live ranges by merging LiveIn and LiveOut. This fixes PR15707. Patch by Mark Seaborn. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181922 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-15 21:15:09 +00:00
;YESCOLOR: subq $200008, %rsp
;NOCOLOR: subq $200008, %rsp
define void @myCall_pr15707() {
%buf1 = alloca i8, i32 100000, align 16
%buf2 = alloca i8, i32 100000, align 16
call void @llvm.lifetime.start(i64 -1, i8* %buf1)
call void @llvm.lifetime.end(i64 -1, i8* %buf1)
call void @llvm.lifetime.start(i64 -1, i8* %buf1)
call void @llvm.lifetime.start(i64 -1, i8* %buf2)
%result1 = call i32 @foo(i32 0, i8* %buf1)
%result2 = call i32 @foo(i32 0, i8* %buf2)
ret void
}
Stack coloring: remove lifetime intervals which contain escaped allocas. The input program may contain intructions which are not inside lifetime markers. This can happen due to a bug in the compiler or due to a bug in user code (for example, returning a reference to a local variable). This commit adds checks that all of the instructions in the function and invalidates lifetime ranges which do not contain all of the instructions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163678 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-12 04:57:37 +00:00
; Check that we don't assert and crash even when there are allocas
; outside the declared lifetime regions.
aad/fix labels in test/CodeGen/X86/StackColoring.ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240744 91177308-0d34-0410-b5e6-96231b3b80d8
2015-06-26 00:26:44 +00:00
;CHECK-LABEL: bad_range:
Stack coloring: remove lifetime intervals which contain escaped allocas. The input program may contain intructions which are not inside lifetime markers. This can happen due to a bug in the compiler or due to a bug in user code (for example, returning a reference to a local variable). This commit adds checks that all of the instructions in the function and invalidates lifetime ranges which do not contain all of the instructions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163678 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-12 04:57:37 +00:00
define void @bad_range() nounwind ssp {
entry:
%A.i1 = alloca [100 x i32], align 4
%B.i2 = alloca [100 x i32], align 4
%A.i = alloca [100 x i32], align 4
%B.i = alloca [100 x i32], align 4
%0 = bitcast [100 x i32]* %A.i to i8*
call void @llvm.lifetime.start(i64 -1, i8* %0) nounwind
%1 = bitcast [100 x i32]* %B.i to i8*
call void @llvm.lifetime.start(i64 -1, i8* %1) nounwind
call void @bar([100 x i32]* %A.i, [100 x i32]* %B.i) nounwind
call void @llvm.lifetime.end(i64 -1, i8* %0) nounwind
call void @llvm.lifetime.end(i64 -1, i8* %1) nounwind
br label %block2
block2:
; I am used outside the marked lifetime.
call void @bar([100 x i32]* %A.i, [100 x i32]* %B.i) nounwind
ret void
}
Stack Coloring: We have code that checks that all of the uses of allocas are within the lifetime zone. Sometime legitimate usages of allocas are hoisted outside of the lifetime zone. For example, GEPS may calculate the address of a member of an allocated struct. This commit makes sure that we only check (abort regions or assert) for instructions that read and write memory using stack frames directly. Notice that by allowing legitimate usages outside the lifetime zone we also stop checking for instructions which use derivatives of allocas. We will catch less bugs in user code and in the compiler itself. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163791 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-13 12:38:37 +00:00
; Check that we don't assert and crash even when there are usages
; of allocas which do not read or write outside the declared lifetime regions.
aad/fix labels in test/CodeGen/X86/StackColoring.ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240744 91177308-0d34-0410-b5e6-96231b3b80d8
2015-06-26 00:26:44 +00:00
;CHECK-LABEL: shady_range:
Stack Coloring: We have code that checks that all of the uses of allocas are within the lifetime zone. Sometime legitimate usages of allocas are hoisted outside of the lifetime zone. For example, GEPS may calculate the address of a member of an allocated struct. This commit makes sure that we only check (abort regions or assert) for instructions that read and write memory using stack frames directly. Notice that by allowing legitimate usages outside the lifetime zone we also stop checking for instructions which use derivatives of allocas. We will catch less bugs in user code and in the compiler itself. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163791 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-13 12:38:37 +00:00
%struct.Klass = type { i32, i32 }
define i32 @shady_range(i32 %argc, i8** nocapture %argv) uwtable {
%a.i = alloca [4 x %struct.Klass], align 16
%b.i = alloca [4 x %struct.Klass], align 16
%a8 = bitcast [4 x %struct.Klass]* %a.i to i8*
%b8 = bitcast [4 x %struct.Klass]* %b.i to i8*
; I am used outside the lifetime zone below:
[opaque pointer type] Add textual IR support for explicit type parameter to getelementptr instruction One of several parallel first steps to remove the target type of pointers, replacing them with a single opaque pointer type. This adds an explicit type parameter to the gep instruction so that when the first parameter becomes an opaque pointer type, the type to gep through is still available to the instructions. * This doesn't modify gep operators, only instructions (operators will be handled separately) * Textual IR changes only. Bitcode (including upgrade) and changing the in-memory representation will be in separate changes. * geps of vectors are transformed as: getelementptr <4 x float*> %x, ... ->getelementptr float, <4 x float*> %x, ... Then, once the opaque pointer type is introduced, this will ultimately look like: getelementptr float, <4 x ptr> %x with the unambiguous interpretation that it is a vector of pointers to float. * address spaces remain on the pointer, not the type: getelementptr float addrspace(1)* %x ->getelementptr float, float addrspace(1)* %x Then, eventually: getelementptr float, ptr addrspace(1) %x Importantly, the massive amount of test case churn has been automated by same crappy python code. I had to manually update a few test cases that wouldn't fit the script's model (r228970,r229196,r229197,r229198). The python script just massages stdin and writes the result to stdout, I then wrapped that in a shell script to handle replacing files, then using the usual find+xargs to migrate all the files. update.py: import fileinput import sys import re ibrep = re.compile(r"(^.*?[^%\w]getelementptr inbounds )(((?:<\d* x )?)(.*?)(| addrspace\(\d\)) *\*(|>)(?:$| *(?:%|@|null|undef|blockaddress|getelementptr|addrspacecast|bitcast|inttoptr|\[\[[a-zA-Z]|\{\{).*$))") normrep = re.compile( r"(^.*?[^%\w]getelementptr )(((?:<\d* x )?)(.*?)(| addrspace\(\d\)) *\*(|>)(?:$| *(?:%|@|null|undef|blockaddress|getelementptr|addrspacecast|bitcast|inttoptr|\[\[[a-zA-Z]|\{\{).*$))") def conv(match, line): if not match: return line line = match.groups()[0] if len(match.groups()[5]) == 0: line += match.groups()[2] line += match.groups()[3] line += ", " line += match.groups()[1] line += "\n" return line for line in sys.stdin: if line.find("getelementptr ") == line.find("getelementptr inbounds"): if line.find("getelementptr inbounds") != line.find("getelementptr inbounds ("): line = conv(re.match(ibrep, line), line) elif line.find("getelementptr ") != line.find("getelementptr ("): line = conv(re.match(normrep, line), line) sys.stdout.write(line) apply.sh: for name in "$@" do python3 `dirname "$0"`/update.py < "$name" > "$name.tmp" && mv "$name.tmp" "$name" rm -f "$name.tmp" done The actual commands: From llvm/src: find test/ -name *.ll | xargs ./apply.sh From llvm/src/tools/clang: find test/ -name *.mm -o -name *.m -o -name *.cpp -o -name *.c | xargs -I '{}' ../../apply.sh "{}" From llvm/src/tools/polly: find test/ -name *.ll | xargs ./apply.sh After that, check-all (with llvm, clang, clang-tools-extra, lld, compiler-rt, and polly all checked out). The extra 'rm' in the apply.sh script is due to a few files in clang's test suite using interesting unicode stuff that my python script was throwing exceptions on. None of those files needed to be migrated, so it seemed sufficient to ignore those cases. Reviewers: rafael, dexonsmith, grosser Differential Revision: http://reviews.llvm.org/D7636 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@230786 91177308-0d34-0410-b5e6-96231b3b80d8
2015-02-27 19:29:02 +00:00
%z2 = getelementptr inbounds [4 x %struct.Klass], [4 x %struct.Klass]* %a.i, i64 0, i64 0, i32 0
Stack Coloring: We have code that checks that all of the uses of allocas are within the lifetime zone. Sometime legitimate usages of allocas are hoisted outside of the lifetime zone. For example, GEPS may calculate the address of a member of an allocated struct. This commit makes sure that we only check (abort regions or assert) for instructions that read and write memory using stack frames directly. Notice that by allowing legitimate usages outside the lifetime zone we also stop checking for instructions which use derivatives of allocas. We will catch less bugs in user code and in the compiler itself. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163791 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-13 12:38:37 +00:00
call void @llvm.lifetime.start(i64 -1, i8* %a8)
call void @llvm.lifetime.start(i64 -1, i8* %b8)
[opaque pointer type] Add textual IR support for explicit type parameter to load instruction Essentially the same as the GEP change in r230786. A similar migration script can be used to update test cases, though a few more test case improvements/changes were required this time around: (r229269-r229278) import fileinput import sys import re pat = re.compile(r"((?:=|:|^)\s*load (?:atomic )?(?:volatile )?(.*?))(| addrspace\(\d+\) *)\*($| *(?:%|@|null|undef|blockaddress|getelementptr|addrspacecast|bitcast|inttoptr|\[\[[a-zA-Z]|\{\{).*$)") for line in sys.stdin: sys.stdout.write(re.sub(pat, r"\1, \2\3*\4", line)) Reviewers: rafael, dexonsmith, grosser Differential Revision: http://reviews.llvm.org/D7649 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@230794 91177308-0d34-0410-b5e6-96231b3b80d8
2015-02-27 21:17:42 +00:00
%z3 = load i32, i32* %z2, align 16
Stack Coloring: We have code that checks that all of the uses of allocas are within the lifetime zone. Sometime legitimate usages of allocas are hoisted outside of the lifetime zone. For example, GEPS may calculate the address of a member of an allocated struct. This commit makes sure that we only check (abort regions or assert) for instructions that read and write memory using stack frames directly. Notice that by allowing legitimate usages outside the lifetime zone we also stop checking for instructions which use derivatives of allocas. We will catch less bugs in user code and in the compiler itself. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163791 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-13 12:38:37 +00:00
%r = call i32 @foo(i32 %z3, i8* %a8)
%r2 = call i32 @foo(i32 %z3, i8* %b8)
call void @llvm.lifetime.end(i64 -1, i8* %a8)
call void @llvm.lifetime.end(i64 -1, i8* %b8)
ret i32 9
}
Add a new optimization pass: Stack Coloring, that merges disjoint static allocations (allocas). Allocas are known to be disjoint if they are marked by disjoint lifetime markers (@llvm.lifetime.XXX intrinsics). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163299 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-06 09:17:37 +00:00
declare void @bar([100 x i32]* , [100 x i32]*) nounwind
declare void @llvm.lifetime.start(i64, i8* nocapture) nounwind
declare void @llvm.lifetime.end(i64, i8* nocapture) nounwind
Stack coloring: remove lifetime intervals which contain escaped allocas. The input program may contain intructions which are not inside lifetime markers. This can happen due to a bug in the compiler or due to a bug in user code (for example, returning a reference to a local variable). This commit adds checks that all of the instructions in the function and invalidates lifetime ranges which do not contain all of the instructions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163678 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-12 04:57:37 +00:00
declare i32 @foo(i32, i8*)
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