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6b7603962a
Leaving empty blocks around just opens up a can of bugs like PR22704. Deleting them early also slightly simplifies code. Thanks to Sanjay for the IR test case. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@230856 91177308-0d34-0410-b5e6-96231b3b80d8
55 lines
1.2 KiB
LLVM
55 lines
1.2 KiB
LLVM
; RUN: opt < %s -tailcallelim -S | FileCheck %s
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; Don't turn this into an infinite loop, this is probably the implementation
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; of fabs and we expect the codegen to lower fabs.
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; CHECK: @fabs(double %f)
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; CHECK: call
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; CHECK: ret
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define double @fabs(double %f) {
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entry:
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%tmp2 = call double @fabs( double %f ) ; <double> [#uses=1]
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ret double %tmp2
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}
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; Do turn other calls into infinite loops though.
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; CHECK-LABEL: define double @foo(
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; CHECK-NOT: call
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; CHECK: }
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define double @foo(double %f) {
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%t= call double @foo(double %f)
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ret double %t
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}
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; CHECK-LABEL: define float @fabsf(
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; CHECK-NOT: call
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; CHECK: }
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define float @fabsf(float %f) {
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%t= call float @fabsf(float 2.0)
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ret float %t
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}
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declare x86_fp80 @fabsl(x86_fp80 %f)
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; Don't crash while transforming a function with infinite recursion.
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define i32 @PR22704(i1 %bool) {
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entry:
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br i1 %bool, label %t, label %f
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t:
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%call1 = call i32 @PR22704(i1 1)
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br label %return
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f:
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%call = call i32 @PR22704(i1 1)
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br label %return
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return:
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ret i32 0
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; CHECK-LABEL: @PR22704(
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; CHECK: %bool.tr = phi i1 [ %bool, %entry ], [ true, %t ], [ true, %f ]
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; CHECK: br i1 %bool.tr, label %t, label %f
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}
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