mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-14 11:32:34 +00:00
503ec9826c
This reverts commit r222142. This is causing/exposing an execution-time regression in spec2006/gcc and coremark on AArch64/A57/Ofast. Conflicts: test/Transforms/Reassociate/optional-flags.ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222398 91177308-0d34-0410-b5e6-96231b3b80d8
71 lines
2.0 KiB
LLVM
71 lines
2.0 KiB
LLVM
; RUN: opt < %s -reassociate -constprop -instcombine -S | FileCheck %s
|
|
|
|
define float @test1(float %A, float %B) {
|
|
; CHECK-LABEL: test1
|
|
; CHECK-NEXT: %W = fadd float %B, 5.000000e+00
|
|
; CHECK-NEXT: %X = fadd float %A, -7.000000e+00
|
|
; CHECK-NEXT: %Y = fsub float %X, %W
|
|
; CHECK-NEXT: %Z = fadd float %Y, 1.200000e+01
|
|
; CHECK-NEXT: ret float %Z
|
|
|
|
%W = fadd float 5.0, %B
|
|
%X = fadd float -7.0, %A
|
|
%Y = fsub float %X, %W
|
|
%Z = fadd float %Y, 12.0
|
|
ret float %Z
|
|
}
|
|
|
|
; With sub reassociation, constant folding can eliminate all of the constants.
|
|
define float @test2(float %A, float %B) {
|
|
; CHECK-LABEL: test2
|
|
; CHECK-NEXT: %Z = fsub fast float %A, %B
|
|
; CHECK-NEXT: ret float %Z
|
|
|
|
%W = fadd fast float %B, 5.000000e+00
|
|
%X = fadd fast float %A, -7.000000e+00
|
|
%Y = fsub fast float %X, %W
|
|
%Z = fadd fast float %Y, 1.200000e+01
|
|
ret float %Z
|
|
|
|
}
|
|
|
|
define float @test3(float %A, float %B, float %C, float %D) {
|
|
; CHECK-LABEL: test3
|
|
; CHECK-NEXT: %M = fadd float %A, 1.200000e+01
|
|
; CHECK-NEXT: %N = fadd float %M, %B
|
|
; CHECK-NEXT: %O = fadd float %N, %C
|
|
; CHECK-NEXT: %P = fsub float %D, %O
|
|
; CHECK-NEXT: %Q = fadd float %P, 1.200000e+01
|
|
; CHECK-NEXT: ret float %Q
|
|
|
|
%M = fadd float %A, 1.200000e+01
|
|
%N = fadd float %M, %B
|
|
%O = fadd float %N, %C
|
|
%P = fsub float %D, %O
|
|
%Q = fadd float %P, 1.200000e+01
|
|
ret float %Q
|
|
}
|
|
|
|
; With sub reassociation, constant folding can eliminate the two 12 constants.
|
|
define float @test4(float %A, float %B, float %C, float %D) {
|
|
; CHECK-LABEL: test4
|
|
; CHECK-NEXT: %B.neg = fsub fast float -0.000000e+00, %B
|
|
; CHECK-NEXT: %O.neg = fsub fast float %B.neg, %A
|
|
; CHECK-NEXT: %P = fsub fast float %O.neg, %C
|
|
; CHECK-NEXT: %Q = fadd fast float %P, %D
|
|
; CHECK-NEXT: ret float %Q
|
|
|
|
; FIXME: InstCombine should be able to get us to the following:
|
|
; %sum = fadd fast float %B, %A
|
|
; %sum1 = fadd fast float %sum, %C
|
|
; %Q = fsub fast float %D, %sum1
|
|
; ret i32 %Q
|
|
|
|
%M = fadd fast float 1.200000e+01, %A
|
|
%N = fadd fast float %M, %B
|
|
%O = fadd fast float %N, %C
|
|
%P = fsub fast float %D, %O
|
|
%Q = fadd fast float 1.200000e+01, %P
|
|
ret float %Q
|
|
}
|