[llvm] [SimplfiyLibCalls] Constant fold `remquo` (PR #99647)

[Matt Arsenault via llvm-commits]

================
@@ -0,0 +1,140 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
+; RUN: opt < %s -passes=instcombine -S | FileCheck %s
+
+define float @remquo_f32(ptr %quo) {
+; CHECK-LABEL: define float @remquo_f32(
+; CHECK-SAME: ptr [[QUO:%.*]]) {
+; CHECK-NEXT:  [[ENTRY:.*:]]
+; CHECK-NEXT:    store i32 -2, ptr [[QUO]], align 4
+; CHECK-NEXT:    ret float 1.000000e+00
+;
+entry:
+  %call = call float @remquof(float -5.000000e+00, float 3.000000e+00, ptr %quo)
+  ret float %call
+}
+
+define float @remquo_f32_quo_sign(ptr %quo) {
+; CHECK-LABEL: define float @remquo_f32_quo_sign(
+; CHECK-SAME: ptr [[QUO:%.*]]) {
+; CHECK-NEXT:  [[ENTRY:.*:]]
+; CHECK-NEXT:    store i32 2, ptr [[QUO]], align 4
+; CHECK-NEXT:    ret float -1.000000e+00
+;
+entry:
+  %call = call float @remquof(float 5.000000e+00, float 3.000000e+00, ptr %quo)
+  ret float %call
+}
+
+define float @remquo_f32_round(ptr %quo) {
+; CHECK-LABEL: define float @remquo_f32_round(
+; CHECK-SAME: ptr [[QUO:%.*]]) {
+; CHECK-NEXT:  [[ENTRY:.*:]]
+; CHECK-NEXT:    store i32 -6, ptr [[QUO]], align 4
+; CHECK-NEXT:    ret float 0xBFC9999900000000
+;
+entry:
+  %call = call float @remquof(float -5.000000e+00, float 0x3FE99999A0000000, ptr %quo)
+  ret float %call
+}
+
+define double @remquo_f64(ptr %quo) {
+; CHECK-LABEL: define double @remquo_f64(
+; CHECK-SAME: ptr [[QUO:%.*]]) {
+; CHECK-NEXT:  [[ENTRY:.*:]]
+; CHECK-NEXT:    store i32 -5, ptr [[QUO]], align 4
+; CHECK-NEXT:    ret double -0.000000e+00
+;
+entry:
+  %call = call double @remquo(double -5.000000e+00, double 1.000000e+00, ptr %quo)
+  ret double %call
+}
+
+define x86_fp80 @remquo_f80(ptr %quo) {
+; CHECK-LABEL: define x86_fp80 @remquo_f80(
+; CHECK-SAME: ptr [[QUO:%.*]]) {
+; CHECK-NEXT:  [[ENTRY:.*:]]
+; CHECK-NEXT:    store i32 -2, ptr [[QUO]], align 4
+; CHECK-NEXT:    ret x86_fp80 0xK3FFF8000000000000000
+;
+entry:
+  %call = call x86_fp80 @remquol(x86_fp80 0xKC001A000000000000000, x86_fp80 0xK4000C000000000000000, ptr %quo)
+  ret x86_fp80 %call
+}
+
+define fp128 @remquo_fp128(ptr %quo) {
----------------
arsenm wrote:

Yes 

https://github.com/llvm/llvm-project/pull/99647