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6c5935d461
This fixes two issues in x86 fptoui lowering. 1) Makes conversions from f80 go through the right path on AVX-512. 2) Implements an inline sequence for fptoui i64 instead of a library call. This improves performance by 6X on SSE3+ and 3X otherwise. Incidentally, it also removes the use of ftol2 for fptoui, which was wrong to begin with, as ftol2 converts to a signed i64, producing wrong results for values >= 2^63. Patch by: mitch.l.bodart@intel.com Differential Revision: http://reviews.llvm.org/D11316 llvm-svn: 245924
35 lines
812 B
LLVM
35 lines
812 B
LLVM
; RUN: llc < %s -mcpu=core-avx-i -mtriple=i386-pc-win32 | FileCheck %s
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%struct_type = type { [64 x <8 x float>], <8 x float> }
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; Function Attrs: nounwind readnone
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declare i32 @llvm.x86.avx.movmsk.ps.256(<8 x float>)
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; Function Attrs: nounwind
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define i32 @equal(<8 x i32> %A) {
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allocas:
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%first_alloc = alloca [64 x <8 x i32>]
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%second_alloc = alloca %struct_type
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%A1 = bitcast <8 x i32> %A to <8 x float>
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%A2 = call i32 @llvm.x86.avx.movmsk.ps.256(<8 x float> %A1)
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ret i32 %A2
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}
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; CHECK: equal
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; CHECK-NOT: vzeroupper
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; CHECK: _chkstk
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; CHECK: ret
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define <8 x float> @foo(<8 x float> %y, i64* %p, double %x) {
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%i = fptoui double %x to i64
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store i64 %i, i64* %p
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%ret = fadd <8 x float> %y, %y
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ret <8 x float> %ret
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}
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; CHECK: foo
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; CHECK-NOT: vzeroupper
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; CHECK: {{cvtt|fist}}
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; CHECK: ret
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