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65 lines
1.3 KiB
LLVM
65 lines
1.3 KiB
LLVM
; RUN: llc < %s -mtriple=arm-apple-darwin -mcpu=cortex-a8 -asm-verbose=false | FileCheck %s
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declare void @bar(i32)
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declare void @car(i32)
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declare void @dar(i32)
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declare void @ear(i32)
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declare void @far(i32)
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declare i1 @qux()
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@GHJK = global i32 0
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declare i8* @choose(i8*, i8*)
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; BranchFolding should tail-duplicate the indirect jump to avoid
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; redundant branching.
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; CHECK: tail_duplicate_me:
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; CHECK: qux
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; CHECK: qux
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; CHECK: ldr r{{.}}, LCPI
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; CHECK: str r
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; CHECK-NEXT: bx r
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; CHECK: ldr r{{.}}, LCPI
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; CHECK: str r
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; CHECK-NEXT: bx r
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; CHECK: ldr r{{.}}, LCPI
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; CHECK: str r
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; CHECK-NEXT: bx r
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define void @tail_duplicate_me() nounwind {
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entry:
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%a = call i1 @qux()
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%c = call i8* @choose(i8* blockaddress(@tail_duplicate_me, %return),
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i8* blockaddress(@tail_duplicate_me, %altret))
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br i1 %a, label %A, label %next
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next:
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%b = call i1 @qux()
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br i1 %b, label %B, label %C
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A:
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call void @bar(i32 0)
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store i32 0, i32* @GHJK
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br label %M
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B:
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call void @car(i32 1)
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store i32 0, i32* @GHJK
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br label %M
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C:
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call void @dar(i32 2)
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store i32 0, i32* @GHJK
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br label %M
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M:
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indirectbr i8* %c, [label %return, label %altret]
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return:
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call void @ear(i32 1000)
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ret void
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altret:
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call void @far(i32 1001)
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ret void
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}
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