mirror of
https://github.com/RPCS3/llvm.git
synced 2024-12-25 21:46:50 +00:00
572645cf84
bug fixes, and with improved heuristics for analyzing foreign-loop addrecs. This change also flattens IVUsers, eliminating the stride-oriented groupings, which makes it easier to work with. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95975 91177308-0d34-0410-b5e6-96231b3b80d8
48 lines
1.8 KiB
LLVM
48 lines
1.8 KiB
LLVM
; RUN: llc < %s -march=arm | FileCheck %s
|
|
|
|
; This loop is rewritten with an indvar which counts down, which
|
|
; frees up a register from holding the trip count.
|
|
|
|
define void @test(i32* %P, i32 %A, i32 %i) nounwind {
|
|
entry:
|
|
; CHECK: str r1, [{{r.*}}, +{{r.*}}, lsl #2]
|
|
icmp eq i32 %i, 0 ; <i1>:0 [#uses=1]
|
|
br i1 %0, label %return, label %bb
|
|
|
|
bb: ; preds = %bb, %entry
|
|
%indvar = phi i32 [ 0, %entry ], [ %indvar.next, %bb ] ; <i32> [#uses=2]
|
|
%i_addr.09.0 = sub i32 %i, %indvar ; <i32> [#uses=1]
|
|
%tmp2 = getelementptr i32* %P, i32 %i_addr.09.0 ; <i32*> [#uses=1]
|
|
store i32 %A, i32* %tmp2
|
|
%indvar.next = add i32 %indvar, 1 ; <i32> [#uses=2]
|
|
icmp eq i32 %indvar.next, %i ; <i1>:1 [#uses=1]
|
|
br i1 %1, label %return, label %bb
|
|
|
|
return: ; preds = %bb, %entry
|
|
ret void
|
|
}
|
|
|
|
; This loop has a non-address use of the count-up indvar, so
|
|
; it'll remain. Now the original store uses a negative-stride address.
|
|
|
|
define void @test_with_forced_iv(i32* %P, i32 %A, i32 %i) nounwind {
|
|
entry:
|
|
; CHECK: str r1, [{{r.*}}, -{{r.*}}, lsl #2]
|
|
icmp eq i32 %i, 0 ; <i1>:0 [#uses=1]
|
|
br i1 %0, label %return, label %bb
|
|
|
|
bb: ; preds = %bb, %entry
|
|
%indvar = phi i32 [ 0, %entry ], [ %indvar.next, %bb ] ; <i32> [#uses=2]
|
|
%i_addr.09.0 = sub i32 %i, %indvar ; <i32> [#uses=1]
|
|
%tmp2 = getelementptr i32* %P, i32 %i_addr.09.0 ; <i32*> [#uses=1]
|
|
store i32 %A, i32* %tmp2
|
|
store i32 %indvar, i32* null
|
|
%indvar.next = add i32 %indvar, 1 ; <i32> [#uses=2]
|
|
icmp eq i32 %indvar.next, %i ; <i1>:1 [#uses=1]
|
|
br i1 %1, label %return, label %bb
|
|
|
|
return: ; preds = %bb, %entry
|
|
ret void
|
|
}
|
|
|