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04dea7e088
In the long-term, we want to replace statistics with something finer-grained that lets us gather per-function data. Remarks are that replacement. Create an ORE instance in SelectionDAGISel, and pass it to SelectionDAG. SelectionDAG was used so that we can emit remarks from all SelectionDAG-related code, including TargetLowering and DAGCombiner. This isn't used in the current patch but Adam tells me he's interested for the fp-contract combines. Use the ORE instance to emit FastISel failures as remarks (instead of the mix of dbgs() dumps and statistics that we currently have). Eventually, we want to have an API that tells us whether remarks are enabled (http://llvm.org/PR32352) so that we don't emit expensive remarks (in this case, dumping IR) when it's not needed. For now, use 'isEnabled' as a crude replacement. This does mean that the replacement for '-fast-isel-verbose' is now '-pass-remarks-missed=isel'. Additionally, clang users also need to enable remark diagnostics, using '-Rpass-missed=isel'. This also removes '-fast-isel-verbose2': there are no static statistics that we want to only enable in asserts builds, so we can always use the remarks regardless of the build type. Differential Revision: https://reviews.llvm.org/D31405 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@299093 91177308-0d34-0410-b5e6-96231b3b80d8
323 lines
7.5 KiB
LLVM
323 lines
7.5 KiB
LLVM
; RUN: llc < %s -mattr=-avx -fast-isel -mcpu=core2 -O0 -regalloc=fast -asm-verbose=0 -fast-isel-abort=1 | FileCheck %s
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; RUN: llc < %s -mattr=-avx -fast-isel -mcpu=core2 -O0 -regalloc=fast -asm-verbose=0 -pass-remarks-missed=isel 2>&1 >/dev/null | FileCheck %s --check-prefix=STDERR --allow-empty
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; RUN: llc < %s -mattr=+avx -fast-isel -mcpu=core2 -O0 -regalloc=fast -asm-verbose=0 -fast-isel-abort=1 | FileCheck %s --check-prefix=AVX
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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"
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target triple = "x86_64-apple-darwin10.0.0"
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; Make sure that fast-isel folds the immediate into the binop even though it
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; is non-canonical.
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define i32 @test1(i32 %i) nounwind ssp {
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%and = and i32 8, %i
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ret i32 %and
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}
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; CHECK-LABEL: test1:
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; CHECK: andl $8,
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; rdar://9289512 - The load should fold into the compare.
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define void @test2(i64 %x) nounwind ssp {
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entry:
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%x.addr = alloca i64, align 8
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store i64 %x, i64* %x.addr, align 8
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%tmp = load i64, i64* %x.addr, align 8
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%cmp = icmp sgt i64 %tmp, 42
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br i1 %cmp, label %if.then, label %if.end
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if.then: ; preds = %entry
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br label %if.end
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if.end: ; preds = %if.then, %entry
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ret void
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; CHECK-LABEL: test2:
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; CHECK: movq %rdi, -8(%rsp)
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; CHECK: cmpq $42, -8(%rsp)
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}
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@G = external global i32
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define i64 @test3() nounwind {
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%A = ptrtoint i32* @G to i64
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ret i64 %A
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; CHECK-LABEL: test3:
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; CHECK: movq _G@GOTPCREL(%rip), %rax
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; CHECK-NEXT: ret
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}
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; rdar://9289558
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@rtx_length = external global [153 x i8]
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define i32 @test4(i64 %idxprom9) nounwind {
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%arrayidx10 = getelementptr inbounds [153 x i8], [153 x i8]* @rtx_length, i32 0, i64 %idxprom9
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%tmp11 = load i8, i8* %arrayidx10, align 1
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%conv = zext i8 %tmp11 to i32
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ret i32 %conv
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; CHECK-LABEL: test4:
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; CHECK: movq _rtx_length@GOTPCREL(%rip), %rax
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; CHECK-NEXT: movzbl (%rax,%rdi), %eax
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; CHECK-NEXT: ret
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}
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; PR3242 - Out of range shifts should not be folded by fastisel.
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define void @test5(i32 %x, i32* %p) nounwind {
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%y = ashr i32 %x, 50000
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store i32 %y, i32* %p
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ret void
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; CHECK-LABEL: test5:
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; CHECK: movl $50000, %ecx
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; CHECK: sarl %cl, %edi
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; CHECK: ret
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}
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; rdar://9289501 - fast isel should fold trivial multiplies to shifts.
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define i64 @test6(i64 %x) nounwind ssp {
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entry:
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%mul = mul nsw i64 %x, 8
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ret i64 %mul
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; CHECK-LABEL: test6:
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; CHECK: shlq $3, %rdi
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}
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define i32 @test7(i32 %x) nounwind ssp {
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entry:
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%mul = mul nsw i32 %x, 8
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ret i32 %mul
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; CHECK-LABEL: test7:
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; CHECK: shll $3, %edi
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}
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; rdar://9289507 - folding of immediates into 64-bit operations.
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define i64 @test8(i64 %x) nounwind ssp {
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entry:
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%add = add nsw i64 %x, 7
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ret i64 %add
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; CHECK-LABEL: test8:
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; CHECK: addq $7, %rdi
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}
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define i64 @test9(i64 %x) nounwind ssp {
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entry:
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%add = mul nsw i64 %x, 7
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ret i64 %add
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; CHECK-LABEL: test9:
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; CHECK: imulq $7, %rdi, %rax
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}
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; rdar://9297011 - Don't reject udiv by a power of 2.
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define i32 @test10(i32 %X) nounwind {
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%Y = udiv i32 %X, 8
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ret i32 %Y
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; CHECK-LABEL: test10:
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; CHECK: shrl $3,
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}
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define i32 @test11(i32 %X) nounwind {
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%Y = sdiv exact i32 %X, 8
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ret i32 %Y
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; CHECK-LABEL: test11:
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; CHECK: sarl $3,
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}
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; rdar://9297006 - Trunc to bool.
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define void @test12(i8 %tmp) nounwind ssp noredzone {
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entry:
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%tobool = trunc i8 %tmp to i1
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br i1 %tobool, label %if.then, label %if.end
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if.then: ; preds = %entry
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call void @test12(i8 0) noredzone
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br label %if.end
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if.end: ; preds = %if.then, %entry
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ret void
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; CHECK-LABEL: test12:
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; CHECK: testb $1,
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; CHECK-NEXT: je L
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; CHECK-NEXT: xorl %edi, %edi
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; CHECK-NEXT: callq
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}
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declare void @test13f(i1 %X)
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define void @test13() nounwind {
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call void @test13f(i1 0)
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ret void
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; CHECK-LABEL: test13:
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; CHECK: xorl %edi, %edi
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; CHECK-NEXT: callq
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}
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; rdar://9297003 - fast isel bails out on all functions taking bools
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define void @test14(i8 %tmp) nounwind ssp noredzone {
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entry:
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%tobool = trunc i8 %tmp to i1
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call void @test13f(i1 zeroext %tobool) noredzone
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ret void
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; CHECK-LABEL: test14:
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; CHECK: andb $1,
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; CHECK: callq
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}
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declare void @llvm.memcpy.p0i8.p0i8.i64(i8*, i8*, i64, i32, i1)
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; rdar://9289488 - fast-isel shouldn't bail out on llvm.memcpy
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define void @test15(i8* %a, i8* %b) nounwind {
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* %a, i8* %b, i64 4, i32 4, i1 false)
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ret void
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; CHECK-LABEL: test15:
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; CHECK-NEXT: movl (%rsi), %eax
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; CHECK-NEXT: movl %eax, (%rdi)
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; CHECK-NEXT: ret
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}
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; Handling for varargs calls
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declare void @test16callee(...) nounwind
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define void @test16() nounwind {
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; CHECK-LABEL: test16:
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; CHECK: movl $1, %edi
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; CHECK: movb $0, %al
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; CHECK: callq _test16callee
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call void (...) @test16callee(i32 1)
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br label %block2
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block2:
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; CHECK: movsd LCP{{.*}}_{{.*}}(%rip), %xmm0
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; CHECK: movb $1, %al
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; CHECK: callq _test16callee
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; AVX: vmovsd LCP{{.*}}_{{.*}}(%rip), %xmm0
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; AVX: movb $1, %al
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; AVX: callq _test16callee
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call void (...) @test16callee(double 1.000000e+00)
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ret void
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}
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declare void @foo() unnamed_addr ssp align 2
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; Verify that we don't fold the load into the compare here. That would move it
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; w.r.t. the call.
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define i32 @test17(i32 *%P) ssp nounwind {
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entry:
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%tmp = load i32, i32* %P
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%cmp = icmp ne i32 %tmp, 5
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call void @foo()
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br i1 %cmp, label %if.then, label %if.else
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if.then: ; preds = %entry
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ret i32 1
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if.else: ; preds = %entry
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ret i32 2
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; CHECK-LABEL: test17:
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; CHECK: movl (%rdi), %eax
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; CHECK: callq _foo
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; CHECK: cmpl $5, %eax
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; CHECK-NEXT: je
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}
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; Check that 0.0 is materialized using xorps
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define void @test18(float* %p1) {
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store float 0.0, float* %p1
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ret void
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; CHECK-LABEL: test18:
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; CHECK: xorps
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}
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; Without any type hints, doubles use the smaller xorps instead of xorpd.
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define void @test19(double* %p1) {
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store double 0.0, double* %p1
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ret void
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; CHECK-LABEL: test19:
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; CHECK: xorps
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}
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; Check that we fast-isel sret
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%struct.a = type { i64, i64, i64 }
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define void @test20() nounwind ssp {
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entry:
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%tmp = alloca %struct.a, align 8
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call void @test20sret(%struct.a* sret %tmp)
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ret void
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; CHECK-LABEL: test20:
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; CHECK: movq %rsp, %rdi
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; CHECK: callq _test20sret
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}
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declare void @test20sret(%struct.a* sret)
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; Check that -0.0 is not materialized using xor
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define void @test21(double* %p1) {
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store double -0.0, double* %p1
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ret void
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; CHECK-LABEL: test21:
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; CHECK-NOT: xor
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; CHECK: movsd LCPI
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}
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; Check that immediate arguments to a function
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; do not cause massive spilling and are used
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; as immediates just before the call.
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define void @test22() nounwind {
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entry:
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call void @foo22(i32 0)
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call void @foo22(i32 1)
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call void @foo22(i32 2)
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call void @foo22(i32 3)
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ret void
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; CHECK-LABEL: test22:
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; CHECK: xorl %edi, %edi
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; CHECK: callq _foo22
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; CHECK: movl $1, %edi
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; CHECK: callq _foo22
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; CHECK: movl $2, %edi
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; CHECK: callq _foo22
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; CHECK: movl $3, %edi
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; CHECK: callq _foo22
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}
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declare void @foo22(i32)
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; PR13563
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define void @test23(i8* noalias sret %result) {
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%a = alloca i8
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%b = call i8* @foo23()
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ret void
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; CHECK-LABEL: test23:
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; CHECK: call
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; CHECK: movq %rdi, %rax
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; CHECK: ret
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}
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declare i8* @foo23()
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declare void @takesi32ptr(i32* %arg)
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; CHECK-LABEL: allocamaterialize
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define void @allocamaterialize() {
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%a = alloca i32
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; CHECK: leaq {{.*}}, %rdi
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call void @takesi32ptr(i32* %a)
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ret void
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}
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; STDERR-NOT: FastISel missed terminator: ret void
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; CHECK-LABEL: win64ccfun
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define x86_64_win64cc void @win64ccfun(i32 %i) {
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; CHECK: ret
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ret void
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}
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