forked from OSchip/llvm-project
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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