Imported Upstream version 5.18.0.167

Former-commit-id: 289509151e0fee68a1b591a20c9f109c3c789d3a

external/llvm/test/Transforms/Reassociate/fast-SubReassociate.ll

@@ -1,106 +0,0 @@
-; 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
-}
-
-; Check again using minimal subset of FMF.
-
-define float @test2_reassoc(float %A, float %B) {
-; CHECK-LABEL: @test2_reassoc(
-; CHECK-NEXT:    [[W:%.*]] = fadd reassoc float %B, 5.000000e+00
-; CHECK-NEXT:    [[X:%.*]] = fadd reassoc float %A, -7.000000e+00
-; CHECK-NEXT:    [[Y:%.*]] = fsub reassoc float [[X]], [[W]]
-; CHECK-NEXT:    [[Z:%.*]] = fadd reassoc float [[Y]], 1.200000e+01
-; CHECK-NEXT:    ret float [[Z]]
-;
-  %W = fadd reassoc float %B, 5.000000e+00
-  %X = fadd reassoc float %A, -7.000000e+00
-  %Y = fsub reassoc float %X, %W
-  %Z = fadd reassoc 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) {
-; 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
-; 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]]
-;
-  %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
-}
-
-; Check again using minimal subset of FMF.
-
-define float @test4_reassoc(float %A, float %B, float %C, float %D) {
-; CHECK-LABEL: @test4_reassoc(
-; CHECK-NEXT:    [[M:%.*]] = fadd reassoc float %A, 1.200000e+01
-; CHECK-NEXT:    [[N:%.*]] = fadd reassoc float [[M]], %B
-; CHECK-NEXT:    [[O:%.*]] = fadd reassoc float [[N]], %C
-; CHECK-NEXT:    [[P:%.*]] = fsub reassoc float %D, [[O]]
-; CHECK-NEXT:    [[Q:%.*]] = fadd reassoc float [[P]], 1.200000e+01
-; CHECK-NEXT:    ret float [[Q]]
-;
-  %M = fadd reassoc float 1.200000e+01, %A
-  %N = fadd reassoc float %M, %B
-  %O = fadd reassoc float %N, %C
-  %P = fsub reassoc float %D, %O
-  %Q = fadd reassoc float 1.200000e+01, %P
-  ret float %Q
-}
-