Set EFLAGS correctly in EmitLoweredSelect on X86.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149597 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Lang Hames
2012-02-02 07:48:37 +00:00
parent d88710a3e0
commit 50a36f7102
2 changed files with 33 additions and 31 deletions

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@@ -6,37 +6,12 @@
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"
; FIXME: This test could generate this code:
;
; ## BB#0: ## %entry
; testq %rdi, %rdi
; jns LBB0_2
; ## BB#1:
; movq %rdi, %rax
; shrq %rax
; andq $1, %rdi
; orq %rax, %rdi
; cvtsi2ssq %rdi, %xmm0
; addss %xmm0, %xmm0
; ret
; LBB0_2: ## %entry
; cvtsi2ssq %rdi, %xmm0
; ret
;
; The blocks come from lowering:
;
; %vreg7<def> = CMOV_FR32 %vreg6<kill>, %vreg5<kill>, 15, %EFLAGS<imp-use>; FR32:%vreg7,%vreg6,%vreg5
;
; If the instruction had an EFLAGS<kill> flag, it wouldn't need to mark EFLAGS
; as live-in on the new blocks, and machine sinking would be able to sink
; everything below the test.
; CHECK: shrq
; CHECK: andq
; CHECK-NEXT: orq
; CHECK: testq %rdi, %rdi
; CHECK-NEXT: jns LBB0_2
; CHECK: cvtsi2ss
; CHECK: shrq
; CHECK-NEXT: andq
; CHECK-NEXT: orq
; CHECK-NEXT: cvtsi2ss
; CHECK: LBB0_2
; CHECK-NEXT: cvtsi2ss
define float @test(i64 %a) {