[llvm] r306524 - Add tests to document current InstCombine behavior for clamp pattern.
Nikolai Bozhenov via llvm-commits
llvm-commits at lists.llvm.org
Wed Jun 28 02:22:58 PDT 2017
Author: n.bozhenov
Date: Wed Jun 28 02:22:58 2017
New Revision: 306524
URL: http://llvm.org/viewvc/llvm-project?rev=306524&view=rev
Log:
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.
Reviewers: spatel, jmolloy
Reviewed By: spatel
Subscribers: n.bozhenov, llvm-commits
Patch by Andrei Elovikov <andrei.elovikov at intel.com>
Differential Revision: https://reviews.llvm.org/D34350
Added:
llvm/trunk/test/Transforms/InstCombine/clamp-to-minmax.ll
Added: llvm/trunk/test/Transforms/InstCombine/clamp-to-minmax.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/InstCombine/clamp-to-minmax.ll?rev=306524&view=auto
==============================================================================
--- llvm/trunk/test/Transforms/InstCombine/clamp-to-minmax.ll (added)
+++ llvm/trunk/test/Transforms/InstCombine/clamp-to-minmax.ll Wed Jun 28 02:22:58 2017
@@ -0,0 +1,500 @@
+; 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
+}
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