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90ba1bcb73
Previously the RedoInsts was processed at the end of the block. However it was possible that it left behind some instructions that were not canonicalized. This should guarantee that any previous instruction in the basic block is canonicalized before we process a new instruction. llvm-svn: 258830
58 lines
1.4 KiB
LLVM
58 lines
1.4 KiB
LLVM
; RUN: opt < %s -reassociate -S | FileCheck %s
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; These tests make sure that before processing insts
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; any previous instructions are already canonicalized.
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define i32 @foo(i32 %in) {
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; CHECK-LABEL: @foo
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; CHECK-NEXT: %factor = mul i32 %in, -4
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; CHECK-NEXT: %factor1 = mul i32 %in, 2
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; CHECK-NEXT: %_3 = add i32 %factor, 1
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; CHECK-NEXT: %_5 = add i32 %_3, %factor1
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; CHECK-NEXT: ret i32 %_5
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%_0 = add i32 %in, 1
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%_1 = mul i32 %in, -2
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%_2 = add i32 %_0, %_1
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%_3 = add i32 %_1, %_2
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%_4 = add i32 %_3, 1
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%_5 = add i32 %in, %_3
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ret i32 %_5
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}
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; CHECK-LABEL: @foo1
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define void @foo1(float %in, i1 %cmp) {
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wrapper_entry:
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br label %foo1
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for.body:
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%0 = fadd float %in1, %in1
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br label %foo1
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foo1:
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%_0 = fmul fast float %in, -3.000000e+00
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%_1 = fmul fast float %_0, 3.000000e+00
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%in1 = fadd fast float -3.000000e+00, %_1
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%in1use = fadd fast float %in1, %in1
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br label %for.body
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}
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; CHECK-LABEL: @foo2
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define void @foo2(float %in, i1 %cmp) {
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wrapper_entry:
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br label %for.body
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for.body:
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; If the operands of the phi are sheduled for processing before
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; foo1 is processed, the invariant of reassociate are not preserved
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%unused = phi float [%in1, %foo1], [undef, %wrapper_entry]
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br label %foo1
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foo1:
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%_0 = fmul fast float %in, -3.000000e+00
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%_1 = fmul fast float %_0, 3.000000e+00
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%in1 = fadd fast float -3.000000e+00, %_1
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%in1use = fadd fast float %in1, %in1
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br label %for.body
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}
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