26 lines
856 B
LLVM
26 lines
856 B
LLVM
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; RUN: llc < %s -verify-machineinstrs -verify-coalescing
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;
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; This function has a PHI with one undefined input. Verify that PHIElimination
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; inserts an IMPLICIT_DEF instruction in the predecessor so all paths to the use
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; pass through a def.
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%struct.xx_stack = type { i32, ptr }
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define i32 @push(ptr %stack) nounwind uwtable readonly ssp {
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entry:
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%tobool1 = icmp eq ptr %stack, null
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br i1 %tobool1, label %for.end, label %for.body
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for.body:
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%stack.addr.02 = phi ptr [ %0, %for.body ], [ %stack, %entry ]
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%next = getelementptr inbounds %struct.xx_stack, ptr %stack.addr.02, i64 0, i32 1
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%0 = load ptr, ptr %next, align 8
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%tobool = icmp eq ptr %0, null
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br i1 %tobool, label %for.end, label %for.body
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for.end:
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%top.0.lcssa = phi ptr [ undef, %entry ], [ %stack.addr.02, %for.body ]
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%1 = load i32, ptr %top.0.lcssa, align 4
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ret i32 %1
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}
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