This is an archive of the discontinued LLVM Phabricator instance.

Differential D34350

Add tests to document current InstCombine behavior for clamp pattern.
ClosedPublic

Authored by a.elovikov on Jun 19 2017, 8:00 AM.

Details

Reviewers
spatel
jmolloy
Commits
rG4ec1bb6f3916: Add tests to document current InstCombine behavior for clamp pattern.
rL306524: Add tests to document current InstCombine behavior for clamp pattern.
Summary

This commit adds the tests for clamp pattern as a prerequisite of
D33186 to make the impact of that fix more clear and also to document
current behavior.

Diff Detail

Event Timeline

a.elovikov created this revision.Jun 19 2017, 8:00 AM
a.elovikov mentioned this in D33186: [InstCombine] Canonicalize clamp of float types to minmax in fast mode..Jun 19 2017, 8:26 AM
spatel accepted this revision.Jun 19 2017, 1:22 PM

LGTM.

This revision is now accepted and ready to land.Jun 19 2017, 1:22 PM
a.elovikov added a child revision: D33186: [InstCombine] Canonicalize clamp of float types to minmax in fast mode..Jun 26 2017, 3:45 AM
spatel added a comment.Jun 26 2017, 6:28 AM

Do you need someone to commit this for you?

a.elovikov added a comment.Jun 26 2017, 8:29 AM
In D34350#790466, @spatel wrote:

Do you need someone to commit this for you?

@n.bozhenov will commit it for me. However, I'm waiting for the D33186 to finish before committing this.

Closed by commit rL306524: Add tests to document current InstCombine behavior for clamp pattern. (authored by n.bozhenov). · Explain WhyJun 28 2017, 2:23 AM
This revision was automatically updated to reflect the committed changes.

Revision Contents

PathSize
llvm/
test/
Transforms/
InstCombine/
500 lines

Diff 103042

llvm/test/Transforms/InstCombine/clamp-to-minmax.ll

  • This file was added.
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instcombine -S | FileCheck %s
; (X < C1) ? C1 : MIN(X, C2)
define float @clamp_float_fast_ordered_strict_maxmin(float %x) {
;
; CHECK-LABEL: @clamp_float_fast_ordered_strict_maxmin(
; CHECK-NEXT: [[CMP2:%.*]] = fcmp fast olt float [[X:%.*]], 2.550000e+02
; CHECK-NEXT: [[MIN:%.*]] = select i1 [[CMP2]], float [[X]], float 2.550000e+02
; CHECK-NEXT: [[CMP1:%.*]] = fcmp fast olt float [[X]], 1.000000e+00
; CHECK-NEXT: [[R:%.*]] = select i1 [[CMP1]], float 1.000000e+00, float [[MIN]]
; CHECK-NEXT: ret float [[R]]
;
%cmp2 = fcmp fast olt float %x, 255.0
%min = select i1 %cmp2, float %x, float 255.0
%cmp1 = fcmp fast olt float %x, 1.0
%r = select i1 %cmp1, float 1.0, float %min
ret float %r
}
; (X <= C1) ? C1 : MIN(X, C2)
define float @clamp_float_fast_ordered_nonstrict_maxmin(float %x) {
;
; CHECK-LABEL: @clamp_float_fast_ordered_nonstrict_maxmin(
; CHECK-NEXT: [[CMP2:%.*]] = fcmp fast olt float [[X:%.*]], 2.550000e+02
; CHECK-NEXT: [[MIN:%.*]] = select i1 [[CMP2]], float [[X]], float 2.550000e+02
; CHECK-NEXT: [[CMP1:%.*]] = fcmp fast ole float [[X]], 1.000000e+00
; CHECK-NEXT: [[R:%.*]] = select i1 [[CMP1]], float 1.000000e+00, float [[MIN]]
; CHECK-NEXT: ret float [[R]]
;
%cmp2 = fcmp fast olt float %x, 255.0
%min = select i1 %cmp2, float %x, float 255.0
%cmp1 = fcmp fast ole float %x, 1.0
%r = select i1 %cmp1, float 1.0, float %min
ret float %r
}
; (X > C1) ? C1 : MAX(X, C2)
define float @clamp_float_fast_ordered_strict_minmax(float %x) {
;
; CHECK-LABEL: @clamp_float_fast_ordered_strict_minmax(
; CHECK-NEXT: [[CMP2:%.*]] = fcmp fast ogt float [[X:%.*]], 1.000000e+00
; CHECK-NEXT: [[MAX:%.*]] = select i1 [[CMP2]], float [[X]], float 1.000000e+00
; CHECK-NEXT: [[CMP1:%.*]] = fcmp fast ogt float [[X]], 2.550000e+02
; CHECK-NEXT: [[R:%.*]] = select i1 [[CMP1]], float 2.550000e+02, float [[MAX]]
; CHECK-NEXT: ret float [[R]]
;
%cmp2 = fcmp fast ogt float %x, 1.0
%max = select i1 %cmp2, float %x, float 1.0
%cmp1 = fcmp fast ogt float %x, 255.0
%r = select i1 %cmp1, float 255.0, float %max
ret float %r
}
; (X >= C1) ? C1 : MAX(X, C2)
define float @clamp_float_fast_ordered_nonstrict_minmax(float %x) {
;
; CHECK-LABEL: @clamp_float_fast_ordered_nonstrict_minmax(
; CHECK-NEXT: [[CMP2:%.*]] = fcmp fast ogt float [[X:%.*]], 1.000000e+00
; CHECK-NEXT: [[MAX:%.*]] = select i1 [[CMP2]], float [[X]], float 1.000000e+00
; CHECK-NEXT: [[CMP1:%.*]] = fcmp fast oge float [[X]], 2.550000e+02
; CHECK-NEXT: [[R:%.*]] = select i1 [[CMP1]], float 2.550000e+02, float [[MAX]]
; CHECK-NEXT: ret float [[R]]
;
%cmp2 = fcmp fast ogt float %x, 1.0
%max = select i1 %cmp2, float %x, float 1.0
%cmp1 = fcmp fast oge float %x, 255.0
%r = select i1 %cmp1, float 255.0, float %max
ret float %r
}
; The same for unordered
; (X < C1) ? C1 : MIN(X, C2)
define float @clamp_float_fast_unordered_strict_maxmin(float %x) {
;
; CHECK-LABEL: @clamp_float_fast_unordered_strict_maxmin(
; CHECK-NEXT: [[CMP2_INV:%.*]] = fcmp fast oge float [[X:%.*]], 2.550000e+02
; CHECK-NEXT: [[MIN:%.*]] = select i1 [[CMP2_INV]], float 2.550000e+02, float [[X]]
; CHECK-NEXT: [[CMP1:%.*]] = fcmp fast ult float [[X]], 1.000000e+00
; CHECK-NEXT: [[R:%.*]] = select i1 [[CMP1]], float 1.000000e+00, float [[MIN]]
; CHECK-NEXT: ret float [[R]]
;
%cmp2 = fcmp fast ult float %x, 255.0
%min = select i1 %cmp2, float %x, float 255.0
%cmp1 = fcmp fast ult float %x, 1.0
%r = select i1 %cmp1, float 1.0, float %min
ret float %r
}
; (X <= C1) ? C1 : MIN(X, C2)
define float @clamp_float_fast_unordered_nonstrict_maxmin(float %x) {
;
; CHECK-LABEL: @clamp_float_fast_unordered_nonstrict_maxmin(
; CHECK-NEXT: [[CMP2_INV:%.*]] = fcmp fast oge float [[X:%.*]], 2.550000e+02
; CHECK-NEXT: [[MIN:%.*]] = select i1 [[CMP2_INV]], float 2.550000e+02, float [[X]]
; CHECK-NEXT: [[CMP1:%.*]] = fcmp fast ule float [[X]], 1.000000e+00
; CHECK-NEXT: [[R:%.*]] = select i1 [[CMP1]], float 1.000000e+00, float [[MIN]]
; CHECK-NEXT: ret float [[R]]
;
%cmp2 = fcmp fast ult float %x, 255.0
%min = select i1 %cmp2, float %x, float 255.0
%cmp1 = fcmp fast ule float %x, 1.0
%r = select i1 %cmp1, float 1.0, float %min
ret float %r
}
; (X > C1) ? C1 : MAX(X, C2)
define float @clamp_float_fast_unordered_strict_minmax(float %x) {
;
; CHECK-LABEL: @clamp_float_fast_unordered_strict_minmax(
; CHECK-NEXT: [[CMP2_INV:%.*]] = fcmp fast ole float [[X:%.*]], 1.000000e+00
; CHECK-NEXT: [[MAX:%.*]] = select i1 [[CMP2_INV]], float 1.000000e+00, float [[X]]
; CHECK-NEXT: [[CMP1:%.*]] = fcmp fast ugt float [[X]], 2.550000e+02
; CHECK-NEXT: [[R:%.*]] = select i1 [[CMP1]], float 2.550000e+02, float [[MAX]]
; CHECK-NEXT: ret float [[R]]
;
%cmp2 = fcmp fast ugt float %x, 1.0
%max = select i1 %cmp2, float %x, float 1.0
%cmp1 = fcmp fast ugt float %x, 255.0
%r = select i1 %cmp1, float 255.0, float %max
ret float %r
}
; (X >= C1) ? C1 : MAX(X, C2)
define float @clamp_float_fast_unordered_nonstrict_minmax(float %x) {
;
; CHECK-LABEL: @clamp_float_fast_unordered_nonstrict_minmax(
; CHECK-NEXT: [[CMP2_INV:%.*]] = fcmp fast ole float [[X:%.*]], 1.000000e+00
; CHECK-NEXT: [[MAX:%.*]] = select i1 [[CMP2_INV]], float 1.000000e+00, float [[X]]
; CHECK-NEXT: [[CMP1:%.*]] = fcmp fast uge float [[X]], 2.550000e+02
; CHECK-NEXT: [[R:%.*]] = select i1 [[CMP1]], float 2.550000e+02, float [[MAX]]
; CHECK-NEXT: ret float [[R]]
;
%cmp2 = fcmp fast ugt float %x, 1.0
%max = select i1 %cmp2, float %x, float 1.0
%cmp1 = fcmp fast uge float %x, 255.0
%r = select i1 %cmp1, float 255.0, float %max
ret float %r
}
; Some more checks with fast
; (X > 1.0) ? min(x, 255.0) : 1.0
define float @clamp_test_1(float %x) {
; CHECK-LABEL: @clamp_test_1(
; CHECK-NEXT: [[INNER_CMP_INV:%.*]] = fcmp fast oge float [[X:%.*]], 2.550000e+02
; CHECK-NEXT: [[INNER_SEL:%.*]] = select i1 [[INNER_CMP_INV]], float 2.550000e+02, float [[X]]
; CHECK-NEXT: [[OUTER_CMP:%.*]] = fcmp fast ugt float [[X]], 1.000000e+00
; CHECK-NEXT: [[R:%.*]] = select i1 [[OUTER_CMP]], float [[INNER_SEL]], float 1.000000e+00
; CHECK-NEXT: ret float [[R]]
;
%inner_cmp = fcmp fast ult float %x, 255.0
%inner_sel = select i1 %inner_cmp, float %x, float 255.0
%outer_cmp = fcmp fast ugt float %x, 1.0
%r = select i1 %outer_cmp, float %inner_sel, float 1.0
ret float %r
}
; And something negative
; Like @clamp_test_1 but HighConst < LowConst
define float @clamp_negative_wrong_const(float %x) {
; CHECK-LABEL: @clamp_negative_wrong_const(
; CHECK-NEXT: [[INNER_CMP_INV:%.*]] = fcmp fast oge float [[X:%.*]], 2.550000e+02
; CHECK-NEXT: [[INNER_SEL:%.*]] = select i1 [[INNER_CMP_INV]], float 2.550000e+02, float [[X]]
; CHECK-NEXT: [[OUTER_CMP:%.*]] = fcmp fast ugt float [[X]], 5.120000e+02
; CHECK-NEXT: [[R:%.*]] = select i1 [[OUTER_CMP]], float [[INNER_SEL]], float 5.120000e+02
; CHECK-NEXT: ret float [[R]]
;
%inner_cmp = fcmp fast ult float %x, 255.0
%inner_sel = select i1 %inner_cmp, float %x, float 255.0
%outer_cmp = fcmp fast ugt float %x, 512.0
%r = select i1 %outer_cmp, float %inner_sel, float 512.0
ret float %r
}
; Like @clamp_test_1 but both are min
define float @clamp_negative_same_op(float %x) {
; CHECK-LABEL: @clamp_negative_same_op(
; CHECK-NEXT: [[INNER_CMP_INV:%.*]] = fcmp fast oge float [[X:%.*]], 2.550000e+02
; CHECK-NEXT: [[INNER_SEL:%.*]] = select i1 [[INNER_CMP_INV]], float 2.550000e+02, float [[X]]
; CHECK-NEXT: [[OUTER_CMP:%.*]] = fcmp fast ult float [[X]], 1.000000e+00
; CHECK-NEXT: [[R:%.*]] = select i1 [[OUTER_CMP]], float [[INNER_SEL]], float 1.000000e+00
; CHECK-NEXT: ret float [[R]]
;
%inner_cmp = fcmp fast ult float %x, 255.0
%inner_sel = select i1 %inner_cmp, float %x, float 255.0
%outer_cmp = fcmp fast ult float %x, 1.0
%r = select i1 %outer_cmp, float %inner_sel, float 1.0
ret float %r
}
; And now without fast.
; First, check that we don't do bad things in the presence of signed zeros
define float @clamp_float_with_zero1(float %x) {
; CHECK-LABEL: @clamp_float_with_zero1(
; CHECK-NEXT: [[CMP2:%.*]] = fcmp fast olt float [[X:%.*]], 2.550000e+02
; CHECK-NEXT: [[MIN:%.*]] = select i1 [[CMP2]], float [[X]], float 2.550000e+02
; CHECK-NEXT: [[CMP1:%.*]] = fcmp ole float [[X]], 0.000000e+00
; CHECK-NEXT: [[R:%.*]] = select i1 [[CMP1]], float 0.000000e+00, float [[MIN]]
; CHECK-NEXT: ret float [[R]]
;
%cmp2 = fcmp fast olt float %x, 255.0
%min = select i1 %cmp2, float %x, float 255.0
%cmp1 = fcmp ole float %x, 0.0
%r = select i1 %cmp1, float 0.0, float %min
ret float %r
}
define float @clamp_float_with_zero2(float %x) {
; CHECK-LABEL: @clamp_float_with_zero2(
; CHECK-NEXT: [[CMP2:%.*]] = fcmp fast olt float [[X:%.*]], 2.550000e+02
; CHECK-NEXT: [[MIN:%.*]] = select i1 [[CMP2]], float [[X]], float 2.550000e+02
; CHECK-NEXT: [[CMP1:%.*]] = fcmp olt float [[X]], 0.000000e+00
; CHECK-NEXT: [[R:%.*]] = select i1 [[CMP1]], float 0.000000e+00, float [[MIN]]
; CHECK-NEXT: ret float [[R]]
;
%cmp2 = fcmp fast olt float %x, 255.0
%min = select i1 %cmp2, float %x, float 255.0
%cmp1 = fcmp olt float %x, 0.0
%r = select i1 %cmp1, float 0.0, float %min
ret float %r
}
; Also, here we care more about the ordering of the inner min/max, so
; two times more cases.
; TODO: that is not implemented yet, so these checks are for the
; future. This means that checks below can just check that
; "fcmp.*%x" happens twice for each label.
; (X < C1) ? C1 : MIN(X, C2)
define float @clamp_float_ordered_strict_maxmin1(float %x) {
;
; CHECK-LABEL: @clamp_float_ordered_strict_maxmin1(
; CHECK-NEXT: [[CMP2:%.*]] = fcmp olt float [[X:%.*]], 2.550000e+02
; CHECK-NEXT: [[MIN:%.*]] = select i1 [[CMP2]], float [[X]], float 2.550000e+02
; CHECK-NEXT: [[CMP1:%.*]] = fcmp olt float [[X]], 1.000000e+00
; CHECK-NEXT: [[R:%.*]] = select i1 [[CMP1]], float 1.000000e+00, float [[MIN]]
; CHECK-NEXT: ret float [[R]]
;
%cmp2 = fcmp olt float %x, 255.0 ; X is NaN => false
%min = select i1 %cmp2, float %x, float 255.0 ; 255.0
%cmp1 = fcmp olt float %x, 1.0 ; false
%r = select i1 %cmp1, float 1.0, float %min ; min (255.0)
ret float %r
}
define float @clamp_float_ordered_strict_maxmin2(float %x) {
;
; CHECK-LABEL: @clamp_float_ordered_strict_maxmin2(
; CHECK-NEXT: [[CMP2_INV:%.*]] = fcmp oge float [[X:%.*]], 2.550000e+02
; CHECK-NEXT: [[MIN:%.*]] = select i1 [[CMP2_INV]], float 2.550000e+02, float [[X]]
; CHECK-NEXT: [[CMP1:%.*]] = fcmp olt float [[X]], 1.000000e+00
; CHECK-NEXT: [[R:%.*]] = select i1 [[CMP1]], float 1.000000e+00, float [[MIN]]
; CHECK-NEXT: ret float [[R]]
;
%cmp2 = fcmp ult float %x, 255.0 ; X is NaN => true
%min = select i1 %cmp2, float %x, float 255.0 ; NaN
%cmp1 = fcmp olt float %x, 1.0 ; false
%r = select i1 %cmp1, float 1.0, float %min ; min (NaN)
ret float %r
}
; (X <= C1) ? C1 : MIN(X, C2)
define float @clamp_float_ordered_nonstrict_maxmin1(float %x) {
;
; CHECK-LABEL: @clamp_float_ordered_nonstrict_maxmin1(
; CHECK-NEXT: [[CMP2:%.*]] = fcmp olt float [[X:%.*]], 2.550000e+02
; CHECK-NEXT: [[MIN:%.*]] = select i1 [[CMP2]], float [[X]], float 2.550000e+02
; CHECK-NEXT: [[CMP1:%.*]] = fcmp ole float [[X]], 1.000000e+00
; CHECK-NEXT: [[R:%.*]] = select i1 [[CMP1]], float 1.000000e+00, float [[MIN]]
; CHECK-NEXT: ret float [[R]]
;
%cmp2 = fcmp olt float %x, 255.0 ; X is NaN => false
%min = select i1 %cmp2, float %x, float 255.0 ; 255.0
%cmp1 = fcmp ole float %x, 1.0 ; false
%r = select i1 %cmp1, float 1.0, float %min ; min (255.0)
ret float %r
}
define float @clamp_float_ordered_nonstrict_maxmin2(float %x) {
;
; CHECK-LABEL: @clamp_float_ordered_nonstrict_maxmin2(
; CHECK-NEXT: [[CMP2_INV:%.*]] = fcmp oge float [[X:%.*]], 2.550000e+02
; CHECK-NEXT: [[MIN:%.*]] = select i1 [[CMP2_INV]], float 2.550000e+02, float [[X]]
; CHECK-NEXT: [[CMP1:%.*]] = fcmp ole float [[X]], 1.000000e+00
; CHECK-NEXT: [[R:%.*]] = select i1 [[CMP1]], float 1.000000e+00, float [[MIN]]
; CHECK-NEXT: ret float [[R]]
;
%cmp2 = fcmp ult float %x, 255.0 ; x is NaN => true
%min = select i1 %cmp2, float %x, float 255.0 ; NaN
%cmp1 = fcmp ole float %x, 1.0 ; false
%r = select i1 %cmp1, float 1.0, float %min ; min (NaN)
ret float %r
}
; (X > C1) ? C1 : MAX(X, C2)
define float @clamp_float_ordered_strict_minmax1(float %x) {
;
; CHECK-LABEL: @clamp_float_ordered_strict_minmax1(
; CHECK-NEXT: [[CMP2:%.*]] = fcmp ogt float [[X:%.*]], 1.000000e+00
; CHECK-NEXT: [[MAX:%.*]] = select i1 [[CMP2]], float [[X]], float 1.000000e+00
; CHECK-NEXT: [[CMP1:%.*]] = fcmp ogt float [[X]], 2.550000e+02
; CHECK-NEXT: [[R:%.*]] = select i1 [[CMP1]], float 2.550000e+02, float [[MAX]]
; CHECK-NEXT: ret float [[R]]
;
%cmp2 = fcmp ogt float %x, 1.0 ; x is NaN => false
%max = select i1 %cmp2, float %x, float 1.0 ; 1.0
%cmp1 = fcmp ogt float %x, 255.0 ; false
%r = select i1 %cmp1, float 255.0, float %max ; max (1.0)
ret float %r
}
define float @clamp_float_ordered_strict_minmax2(float %x) {
;
; CHECK-LABEL: @clamp_float_ordered_strict_minmax2(
; CHECK-NEXT: [[CMP2_INV:%.*]] = fcmp ole float [[X:%.*]], 1.000000e+00
; CHECK-NEXT: [[MAX:%.*]] = select i1 [[CMP2_INV]], float 1.000000e+00, float [[X]]
; CHECK-NEXT: [[CMP1:%.*]] = fcmp ogt float [[X]], 2.550000e+02
; CHECK-NEXT: [[R:%.*]] = select i1 [[CMP1]], float 2.550000e+02, float [[MAX]]
; CHECK-NEXT: ret float [[R]]
;
%cmp2 = fcmp ugt float %x, 1.0 ; x is NaN => true
%max = select i1 %cmp2, float %x, float 1.0 ; NaN
%cmp1 = fcmp ogt float %x, 255.0 ; false
%r = select i1 %cmp1, float 255.0, float %max ; max (NaN)
ret float %r
}
; (X >= C1) ? C1 : MAX(X, C2)
define float @clamp_float_ordered_nonstrict_minmax1(float %x) {
;
; CHECK-LABEL: @clamp_float_ordered_nonstrict_minmax1(
; CHECK-NEXT: [[CMP2:%.*]] = fcmp ogt float [[X:%.*]], 1.000000e+00
; CHECK-NEXT: [[MAX:%.*]] = select i1 [[CMP2]], float [[X]], float 1.000000e+00
; CHECK-NEXT: [[CMP1:%.*]] = fcmp oge float [[X]], 2.550000e+02
; CHECK-NEXT: [[R:%.*]] = select i1 [[CMP1]], float 2.550000e+02, float [[MAX]]
; CHECK-NEXT: ret float [[R]]
;
%cmp2 = fcmp ogt float %x, 1.0 ; x is NaN => false
%max = select i1 %cmp2, float %x, float 1.0 ; 1.0
%cmp1 = fcmp oge float %x, 255.0 ; false
%r = select i1 %cmp1, float 255.0, float %max ; max (1.0)
ret float %r
}
define float @clamp_float_ordered_nonstrict_minmax2(float %x) {
;
; CHECK-LABEL: @clamp_float_ordered_nonstrict_minmax2(
; CHECK-NEXT: [[CMP2_INV:%.*]] = fcmp ole float [[X:%.*]], 1.000000e+00
; CHECK-NEXT: [[MAX:%.*]] = select i1 [[CMP2_INV]], float 1.000000e+00, float [[X]]
; CHECK-NEXT: [[CMP1:%.*]] = fcmp oge float [[X]], 2.550000e+02
; CHECK-NEXT: [[R:%.*]] = select i1 [[CMP1]], float 2.550000e+02, float [[MAX]]
; CHECK-NEXT: ret float [[R]]
;
%cmp2 = fcmp ugt float %x, 1.0 ; x is NaN => true
%max = select i1 %cmp2, float %x, float 1.0 ; NaN
%cmp1 = fcmp oge float %x, 255.0 ; false
%r = select i1 %cmp1, float 255.0, float %max ; max (NaN)
ret float %r
}
; The same for unordered
; (X < C1) ? C1 : MIN(X, C2)
define float @clamp_float_unordered_strict_maxmin1(float %x) {
;
; CHECK-LABEL: @clamp_float_unordered_strict_maxmin1(
; CHECK-NEXT: [[CMP2:%.*]] = fcmp olt float [[X:%.*]], 2.550000e+02
; CHECK-NEXT: [[MIN:%.*]] = select i1 [[CMP2]], float [[X]], float 2.550000e+02
; CHECK-NEXT: [[CMP1:%.*]] = fcmp ult float [[X]], 1.000000e+00
; CHECK-NEXT: [[R:%.*]] = select i1 [[CMP1]], float 1.000000e+00, float [[MIN]]
; CHECK-NEXT: ret float [[R]]
;
%cmp2 = fcmp olt float %x, 255.0 ; x is NaN => false
%min = select i1 %cmp2, float %x, float 255.0 ; 255.0
%cmp1 = fcmp ult float %x, 1.0 ; true
%r = select i1 %cmp1, float 1.0, float %min ; 1.0
ret float %r
}
define float @clamp_float_unordered_strict_maxmin2(float %x) {
;
; CHECK-LABEL: @clamp_float_unordered_strict_maxmin2(
; CHECK-NEXT: [[CMP2_INV:%.*]] = fcmp oge float [[X:%.*]], 2.550000e+02
; CHECK-NEXT: [[MIN:%.*]] = select i1 [[CMP2_INV]], float 2.550000e+02, float [[X]]
; CHECK-NEXT: [[CMP1:%.*]] = fcmp ult float [[X]], 1.000000e+00
; CHECK-NEXT: [[R:%.*]] = select i1 [[CMP1]], float 1.000000e+00, float [[MIN]]
; CHECK-NEXT: ret float [[R]]
;
%cmp2 = fcmp ult float %x, 255.0 ; x is NaN => true
%min = select i1 %cmp2, float %x, float 255.0 ; NaN
%cmp1 = fcmp ult float %x, 1.0 ; true
%r = select i1 %cmp1, float 1.0, float %min ; 1.0
ret float %r
}
; (X <= C1) ? C1 : MIN(X, C2)
define float @clamp_float_unordered_nonstrict_maxmin1(float %x) {
;
; CHECK-LABEL: @clamp_float_unordered_nonstrict_maxmin1(
; CHECK-NEXT: [[CMP2:%.*]] = fcmp olt float [[X:%.*]], 2.550000e+02
; CHECK-NEXT: [[MIN:%.*]] = select i1 [[CMP2]], float [[X]], float 2.550000e+02
; CHECK-NEXT: [[CMP1:%.*]] = fcmp ule float [[X]], 1.000000e+00
; CHECK-NEXT: [[R:%.*]] = select i1 [[CMP1]], float 1.000000e+00, float [[MIN]]
; CHECK-NEXT: ret float [[R]]
;
%cmp2 = fcmp olt float %x, 255.0 ; x is NaN => false
%min = select i1 %cmp2, float %x, float 255.0 ; 255.0
%cmp1 = fcmp ule float %x, 1.0 ; true
%r = select i1 %cmp1, float 1.0, float %min ; 1.0
ret float %r
}
define float @clamp_float_unordered_nonstrict_maxmin2(float %x) {
;
; CHECK-LABEL: @clamp_float_unordered_nonstrict_maxmin2(
; CHECK-NEXT: [[CMP2_INV:%.*]] = fcmp oge float [[X:%.*]], 2.550000e+02
; CHECK-NEXT: [[MIN:%.*]] = select i1 [[CMP2_INV]], float 2.550000e+02, float [[X]]
; CHECK-NEXT: [[CMP1:%.*]] = fcmp ule float [[X]], 1.000000e+00
; CHECK-NEXT: [[R:%.*]] = select i1 [[CMP1]], float 1.000000e+00, float [[MIN]]
; CHECK-NEXT: ret float [[R]]
;
%cmp2 = fcmp ult float %x, 255.0 ; x is NaN => true
%min = select i1 %cmp2, float %x, float 255.0 ; NaN
%cmp1 = fcmp ule float %x, 1.0 ; true
%r = select i1 %cmp1, float 1.0, float %min ; 1.0
ret float %r
}
; (X > C1) ? C1 : MAX(X, C2)
define float @clamp_float_unordered_strict_minmax1(float %x) {
;
; CHECK-LABEL: @clamp_float_unordered_strict_minmax1(
; CHECK-NEXT: [[CMP2:%.*]] = fcmp ogt float [[X:%.*]], 1.000000e+00
; CHECK-NEXT: [[MAX:%.*]] = select i1 [[CMP2]], float [[X]], float 1.000000e+00
; CHECK-NEXT: [[CMP1:%.*]] = fcmp ugt float [[X]], 2.550000e+02
; CHECK-NEXT: [[R:%.*]] = select i1 [[CMP1]], float 2.550000e+02, float [[MAX]]
; CHECK-NEXT: ret float [[R]]
;
%cmp2 = fcmp ogt float %x, 1.0 ; x is NaN => false
%max = select i1 %cmp2, float %x, float 1.0 ; 1.0
%cmp1 = fcmp ugt float %x, 255.0 ; true
%r = select i1 %cmp1, float 255.0, float %max ; 255.0
ret float %r
}
define float @clamp_float_unordered_strict_minmax2(float %x) {
;
; CHECK-LABEL: @clamp_float_unordered_strict_minmax2(
; CHECK-NEXT: [[CMP2_INV:%.*]] = fcmp ole float [[X:%.*]], 1.000000e+00
; CHECK-NEXT: [[MAX:%.*]] = select i1 [[CMP2_INV]], float 1.000000e+00, float [[X]]
; CHECK-NEXT: [[CMP1:%.*]] = fcmp ugt float [[X]], 2.550000e+02
; CHECK-NEXT: [[R:%.*]] = select i1 [[CMP1]], float 2.550000e+02, float [[MAX]]
; CHECK-NEXT: ret float [[R]]
;
%cmp2 = fcmp ugt float %x, 1.0 ; x is NaN => true
%max = select i1 %cmp2, float %x, float 1.0 ; NaN
%cmp1 = fcmp ugt float %x, 255.0 ; true
%r = select i1 %cmp1, float 255.0, float %max ; 255.0
ret float %r
}
; (X >= C1) ? C1 : MAX(X, C2)
define float @clamp_float_unordered_nonstrict_minmax1(float %x) {
;
; CHECK-LABEL: @clamp_float_unordered_nonstrict_minmax1(
; CHECK-NEXT: [[CMP2:%.*]] = fcmp ogt float [[X:%.*]], 1.000000e+00
; CHECK-NEXT: [[MAX:%.*]] = select i1 [[CMP2]], float [[X]], float 1.000000e+00
; CHECK-NEXT: [[CMP1:%.*]] = fcmp uge float [[X]], 2.550000e+02
; CHECK-NEXT: [[R:%.*]] = select i1 [[CMP1]], float 2.550000e+02, float [[MAX]]
; CHECK-NEXT: ret float [[R]]
;
%cmp2 = fcmp ogt float %x, 1.0 ; x is NaN => false
%max = select i1 %cmp2, float %x, float 1.0 ; 1.0
%cmp1 = fcmp uge float %x, 255.0 ; true
%r = select i1 %cmp1, float 255.0, float %max ; 255.0
ret float %r
}
define float @clamp_float_unordered_nonstrict_minmax2(float %x) {
;
; CHECK-LABEL: @clamp_float_unordered_nonstrict_minmax2(
; CHECK-NEXT: [[CMP2_INV:%.*]] = fcmp ole float [[X:%.*]], 1.000000e+00
; CHECK-NEXT: [[MAX:%.*]] = select i1 [[CMP2_INV]], float 1.000000e+00, float [[X]]
; CHECK-NEXT: [[CMP1:%.*]] = fcmp uge float [[X]], 2.550000e+02
; CHECK-NEXT: [[R:%.*]] = select i1 [[CMP1]], float 2.550000e+02, float [[MAX]]
; CHECK-NEXT: ret float [[R]]
;
%cmp2 = fcmp ugt float %x, 1.0 ; x is NaN => true
%max = select i1 %cmp2, float %x, float 1.0 ; NaN
%cmp1 = fcmp uge float %x, 255.0 ; true
%r = select i1 %cmp1, float 255.0, float %max ; 255.0
ret float %r
}