forked from OSchip/llvm-project
94 lines
2.4 KiB
LLVM
94 lines
2.4 KiB
LLVM
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; RUN: opt -gvn-hoist -S < %s | FileCheck %s
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; Check that convergent calls are not hoisted.
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;
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; CHECK-LABEL: @no_convergent_func_hoisting(
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; CHECK: if.then:
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; CHECK: call float @convergent_func(
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; CHECK: if.else:
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; CHECK: call float @convergent_func(
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define float @no_convergent_func_hoisting(float %d, float %min, float %max, float %a) {
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entry:
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%div = fdiv float 1.000000e+00, %d
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%cmp = fcmp oge float %div, 0.000000e+00
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br i1 %cmp, label %if.then, label %if.else
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if.then:
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%sub1 = fsub float %max, %a
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%mul2 = call float @convergent_func(float %sub1, float %div)
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br label %if.end
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if.else:
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%sub5 = fsub float %max, %a
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%mul6 = call float @convergent_func(float %sub5, float %div)
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br label %if.end
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if.end:
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%tmax.0 = phi float [ %mul2, %if.then ], [ %mul6, %if.else ]
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%add = fadd float %tmax.0, 10.0
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ret float %add
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}
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; The call site is convergent but the declaration is not.
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; CHECK-LABEL: @no_convergent_call_hoisting(
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; CHECK: if.then:
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; CHECK: call float @func(
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; CHECK: if.else:
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; CHECK: call float @func(
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define float @no_convergent_call_hoisting(float %d, float %min, float %max, float %a) {
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entry:
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%div = fdiv float 1.000000e+00, %d
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%cmp = fcmp oge float %div, 0.000000e+00
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br i1 %cmp, label %if.then, label %if.else
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if.then:
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%sub1 = fsub float %max, %a
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%mul2 = call float @func(float %sub1, float %div) #0
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br label %if.end
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if.else:
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%sub5 = fsub float %max, %a
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%mul6 = call float @func(float %sub5, float %div) #0
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br label %if.end
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if.end:
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%tmax.0 = phi float [ %mul2, %if.then ], [ %mul6, %if.else ]
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%add = fadd float %tmax.0, 10.0
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ret float %add
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}
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; The call site is convergent but the declaration is not.
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; CHECK-LABEL: @call_hoisting(
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; CHECK: call float @func(
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; CHECK-NOT: call float @func(
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define float @call_hoisting(float %d, float %min, float %max, float %a) {
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entry:
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%div = fdiv float 1.000000e+00, %d
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%cmp = fcmp oge float %div, 0.000000e+00
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br i1 %cmp, label %if.then, label %if.else
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if.then:
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%sub1 = fsub float %max, %a
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%mul2 = call float @func(float %sub1, float %div)
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br label %if.end
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if.else:
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%sub5 = fsub float %max, %a
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%mul6 = call float @func(float %sub5, float %div)
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br label %if.end
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if.end:
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%tmax.0 = phi float [ %mul2, %if.then ], [ %mul6, %if.else ]
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%add = fadd float %tmax.0, 10.0
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ret float %add
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}
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declare float @convergent_func(float, float) #0
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declare float @func(float, float) #1
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attributes #0 = { nounwind readnone convergent }
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attributes #1 = { nounwind readnone }
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