115 lines
3.9 KiB
LLVM
115 lines
3.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
|
; RUN: opt < %s -reassociate -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.
|
|
; Both 'reassoc' and 'nsz' are required.
|
|
define float @test2_minimal(float %A, float %B) {
|
|
; CHECK-LABEL: @test2_minimal(
|
|
; CHECK-NEXT: [[TMP1:%.*]] = fsub reassoc nsz float [[A:%.*]], [[B:%.*]]
|
|
; CHECK-NEXT: ret float [[TMP1]]
|
|
;
|
|
%W = fadd reassoc nsz float %B, 5.000000e+00
|
|
%X = fadd reassoc nsz float %A, -7.000000e+00
|
|
%Y = fsub reassoc nsz float %X, %W
|
|
%Z = fadd reassoc nsz float %Y, 1.200000e+01
|
|
ret float %Z
|
|
}
|
|
|
|
; Verify the fold is not done with only 'reassoc' ('nsz' is required).
|
|
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) {
|
|
; CHECK-LABEL: @test4(
|
|
; CHECK-NEXT: [[TMP1:%.*]] = fadd fast float [[B:%.*]], [[A:%.*]]
|
|
; CHECK-NEXT: [[TMP2:%.*]] = fadd fast float [[TMP1]], [[C:%.*]]
|
|
; CHECK-NEXT: [[Q:%.*]] = fsub fast float [[D:%.*]], [[TMP2]]
|
|
; 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
|
|
}
|
|
|