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b1ff87ec86
Previously the patterns didn't have high enough priority and we would only use the GR32 form if the only the upper 32 or 56 bits were zero. Fixes PR23100. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@234075 91177308-0d34-0410-b5e6-96231b3b80d8
23 lines
688 B
LLVM
23 lines
688 B
LLVM
; RUN: llc < %s -mcpu=generic -march=x86-64 | FileCheck %s
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; Verify that we are using the efficient uitofp --> sitofp lowering illustrated
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; by the compiler_rt implementation of __floatundisf.
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; <rdar://problem/8493982>
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
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target triple = "x86_64-apple-darwin10.0.0"
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; CHECK: andl
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; CHECK-NEXT: testq %rdi, %rdi
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; CHECK-NEXT: js LBB0_1
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; CHECK: cvtsi2ss
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; CHECK-NEXT: ret
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; CHECK: LBB0_1
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; CHECK: shrq
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; CHECK-NEXT: orq
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; CHECK-NEXT: cvtsi2ss
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define float @test(i64 %a) {
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entry:
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%b = uitofp i64 %a to float
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ret float %b
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}
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