36 lines
1.3 KiB
LLVM
36 lines
1.3 KiB
LLVM
; RUN: llc < %s | FileCheck %s
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-unknown"
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define void @PR22524({ float, float }* %arg) {
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; Check that we can materialize the zero constants we store in two places here,
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; and at least form a legal store of the floating point value at the end.
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; The DAG combiner at one point contained bugs that given enough permutations
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; would incorrectly form an illegal operation for the last of these stores when
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; it folded it to a zero too late to legalize the zero store operation. If this
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; ever starts forming a zero store instead of movss, the test case has stopped
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; being useful.
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;
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; CHECK-LABEL: PR22524:
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entry:
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%0 = getelementptr inbounds { float, float }, { float, float }* %arg, i32 0, i32 1
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store float 0.000000e+00, float* %0, align 4
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; CHECK: movl $0, 4(%rdi)
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%1 = getelementptr inbounds { float, float }, { float, float }* %arg, i64 0, i32 0
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%2 = bitcast float* %1 to i64*
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%3 = load i64, i64* %2, align 8
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%4 = trunc i64 %3 to i32
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%5 = lshr i64 %3, 32
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%6 = trunc i64 %5 to i32
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%7 = bitcast i32 %6 to float
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%8 = fmul float %7, 0.000000e+00
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%9 = bitcast float* %1 to i32*
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store i32 %6, i32* %9, align 4
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; CHECK: movl $0, (%rdi)
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store float %8, float* %0, align 4
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; CHECK: movss %{{.*}}, 4(%rdi)
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ret void
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}
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