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llvm-mirror/test/CodeGen/X86/uint64-to-float.ll
Bill Wendling c137296347 Use –mcpu=generic, so that the test will not fail when run on an Intel Atom
processor, due to the Atom scheduler producing an instruction sequence that is
different from that which is expected.
Patch by Michael Spencer!

llvm-svn: 150736
2012-02-16 22:42:48 +00:00

22 lines
676 B
LLVM

; RUN: llc < %s -mcpu=generic -march=x86-64 | FileCheck %s
; Verify that we are using the efficient uitofp --> sitofp lowering illustrated
; by the compiler_rt implementation of __floatundisf.
; <rdar://problem/8493982>
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"
target triple = "x86_64-apple-darwin10.0.0"
; CHECK: testq %rdi, %rdi
; CHECK-NEXT: jns LBB0_2
; CHECK: shrq
; CHECK-NEXT: andq
; CHECK-NEXT: orq
; CHECK-NEXT: cvtsi2ss
; CHECK: LBB0_2
; CHECK-NEXT: cvtsi2ss
define float @test(i64 %a) {
entry:
%b = uitofp i64 %a to float
ret float %b
}