46 lines
1.2 KiB
LLVM
46 lines
1.2 KiB
LLVM
; Test that the set of used phys regs used by interprocedural register
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; allocation is correct for a test case where the called function (@fn2)
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; itself has a call (to @fn1). @fn1 defines %r0l, while @fn2 defines
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; %r0d. The RegUsageInfo for @fn2 must include %r0h.
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;
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; RUN: llc -mtriple=s390x-linux-gnu -mcpu=z13 -enable-ipra -print-regusage 2>&1 < %s \
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; RUN: | FileCheck %s
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;
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; CHECK: fn2 Clobbered Registers: {{.*}} $r0h
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@h = external global [0 x i32], align 4
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@n = external global i32*, align 8
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define void @fn1() {
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bb:
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br label %bb1
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bb1: ; preds = %bb1, %bb
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%tmp = getelementptr inbounds [0 x i32], [0 x i32]* @h, i64 0, i64 undef
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%tmp2 = load i32, i32* %tmp
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store i32 %tmp2, i32* undef
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br label %bb1
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}
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define void @fn2() {
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bb:
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br label %bb1
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bb1: ; preds = %bb
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br i1 undef, label %bb2, label %bb3
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bb2: ; preds = %bb1
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store i32* null, i32** @n
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unreachable
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bb3: ; preds = %bb1
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call void @fn1()
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unreachable
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}
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define void @main() {
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bb:
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call void @fn2()
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ret void
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}
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