forked from OSchip/llvm-project
47 lines
1.6 KiB
LLVM
47 lines
1.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
|
|
; RUN: llc -mtriple x86_64 < %s | FileCheck %s
|
|
|
|
; To ensure unused floating point constant is correctly removed
|
|
define float @test(float %src, float* %p) {
|
|
; CHECK-LABEL: test:
|
|
; CHECK: # %bb.0: # %entry
|
|
; CHECK-NEXT: movq $0, (%rdi)
|
|
; CHECK-NEXT: xorps %xmm0, %xmm0
|
|
; CHECK-NEXT: retq
|
|
entry:
|
|
%a0 = getelementptr inbounds float, float* %p, i32 0
|
|
%a1 = getelementptr inbounds float, float* %p, i32 1
|
|
store float 0.000000e+00, float* %a0
|
|
store float 0.000000e+00, float* %a1
|
|
%zero = load float, float* %a0
|
|
%fmul1 = fmul fast float %zero, %src
|
|
%fadd1 = fadd fast float %fmul1, %zero
|
|
%fmul2 = fmul fast float %fadd1, 2.000000e+00
|
|
%fmul3 = fmul fast float %fmul2, %fmul2
|
|
%fmul4 = fmul fast float %fmul2, 2.000000e+00
|
|
%fadd2 = fadd fast float %fmul4, -3.000000e+00
|
|
%fmul5 = fmul fast float %fadd2, %fmul2
|
|
%fadd3 = fadd fast float %fmul2, %src
|
|
%fadd4 = fadd fast float %fadd3, %fmul5
|
|
%fmul6 = fmul fast float %fmul3, %fadd4
|
|
ret float %fmul6
|
|
}
|
|
|
|
; To ensure negated result will not be removed when NegX=NegY and
|
|
; NegX is needed
|
|
define float @test2(float %x, float %y) {
|
|
; CHECK-LABEL: test2:
|
|
; CHECK: # %bb.0:
|
|
; CHECK-NEXT: movaps %xmm1, %xmm0
|
|
; CHECK-NEXT: mulss {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm0
|
|
; CHECK-NEXT: retq
|
|
%add = fadd fast float %x, 750.0
|
|
%sub = fsub fast float %x, %add
|
|
%mul = fmul fast float %sub, %sub
|
|
%mul2 = fmul fast float %mul, %sub
|
|
%add2 = fadd fast float %mul2, 1.0
|
|
%add3 = fadd fast float %mul2, %add2
|
|
%mul3 = fmul fast float %y, %add3
|
|
ret float %mul3
|
|
}
|