0676acb6fd
Should cover most of the tests for GVN, GVNHoist, GVNSink, GlobalOpt, GlobalSplit, InstCombine, Reassociate, SROA and TailCallElim that had not been updated earlier.
52 lines
1.1 KiB
LLVM
52 lines
1.1 KiB
LLVM
; RUN: opt -S < %s -passes=gvn | FileCheck %s
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declare void @llvm.sideeffect()
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; Store-to-load forwarding across a @llvm.sideeffect.
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; CHECK-LABEL: s2l
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; CHECK-NOT: load
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define float @s2l(float* %p) {
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store float 0.0, float* %p
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call void @llvm.sideeffect()
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%t = load float, float* %p
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ret float %t
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}
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; Redundant load elimination across a @llvm.sideeffect.
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; CHECK-LABEL: rle
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; CHECK: load
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; CHECK-NOT: load
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define float @rle(float* %p) {
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%r = load float, float* %p
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call void @llvm.sideeffect()
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%s = load float, float* %p
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%t = fadd float %r, %s
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ret float %t
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}
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; LICM across a @llvm.sideeffect.
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; CHECK-LABEL: licm
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; CHECK: load
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; CHECK: loop:
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; CHECK-NOT: load
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define float @licm(i64 %n, float* nocapture readonly %p) #0 {
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bb0:
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br label %loop
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loop:
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%i = phi i64 [ 0, %bb0 ], [ %t5, %loop ]
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%sum = phi float [ 0.000000e+00, %bb0 ], [ %t4, %loop ]
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call void @llvm.sideeffect()
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%t3 = load float, float* %p
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%t4 = fadd float %sum, %t3
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%t5 = add i64 %i, 1
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%t6 = icmp ult i64 %t5, %n
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br i1 %t6, label %loop, label %bb2
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bb2:
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ret float %t4
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}
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