[llvm] [ConstantFold] Fold `log1p` and `log1pf` when the input parameter is a constant value. (PR #112113)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,113 @@
+; 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 @log1pf_const() {
+; CHECK-LABEL: define float @log1pf_const() {
+; CHECK-NEXT:    [[R:%.*]] = call float @log1pf(float 7.000000e+00)
+; CHECK-NEXT:    ret float 0x4000A2B240000000
+;
+  %r = call float @log1pf(float 7.000000e+00)
+  ret float %r
+}
+
+define double @log1p_const() {
+; CHECK-LABEL: define double @log1p_const() {
+; CHECK-NEXT:    [[R:%.*]] = call double @log1p(double 7.000000e+00)
+; CHECK-NEXT:    ret double 0x4000A2B23F3BAB73
+;
+  %r = call double @log1p(double 7.000000e+00)
+  ret double %r
+}
+
+define float @log1pf_minus_one() {
+; CHECK-LABEL: define float @log1pf_minus_one() {
+; CHECK-NEXT:    [[R:%.*]] = call float @log1pf(float -1.000000e+00)
+; CHECK-NEXT:    ret float [[R]]
+;
+  %r = call float @log1pf(float -1.000000e+00)
+  ret float %r
+}
+
+define double @log1p_minus_one() {
+; CHECK-LABEL: define double @log1p_minus_one() {
+; CHECK-NEXT:    [[R:%.*]] = call double @log1p(double -1.000000e+00)
+; CHECK-NEXT:    ret double [[R]]
+;
+  %r = call double @log1p(double -1.000000e+00)
+  ret double %r
+}
+
+define float @log1pf_zero() {
+; CHECK-LABEL: define float @log1pf_zero() {
+; CHECK-NEXT:    [[R:%.*]] = call float @log1pf(float 0.000000e+00)
+; CHECK-NEXT:    ret float 0.000000e+00
+;
+  %r = call float @log1pf(float 0.000000e+00)
+  ret float %r
+}
+
+define double @log1p_zero() {
+; CHECK-LABEL: define double @log1p_zero() {
+; CHECK-NEXT:    [[R:%.*]] = call double @log1p(double 0.000000e+00)
+; CHECK-NEXT:    ret double 0.000000e+00
+;
+  %r = call double @log1p(double 0.000000e+00)
+  ret double %r
+}
+
+define float @log1pf_inf() {
+; CHECK-LABEL: define float @log1pf_inf() {
+; CHECK-NEXT:    [[R:%.*]] = call float @log1pf(float 0x7FF0000000000000)
+; CHECK-NEXT:    ret float [[R]]
+;
+  %r = call float @log1pf(float 0x7FF0000000000000)
+  ret float %r
+}
+
+define double @log1p_inf() {
+; CHECK-LABEL: define double @log1p_inf() {
+; CHECK-NEXT:    [[R:%.*]] = call double @log1p(double 0x7FF0000000000000)
+; CHECK-NEXT:    ret double [[R]]
+;
+  %r = call double @log1p(double 0x7FF0000000000000)
+  ret double %r
+}
+
+define float @log1pf_nan() {
+; CHECK-LABEL: define float @log1pf_nan() {
+; CHECK-NEXT:    [[R:%.*]] = call float @log1pf(float 0x7FF8000000000000)
+; CHECK-NEXT:    ret float [[R]]
+;
+  %r = call float @log1pf(float 0x7FF8000000000000)
+  ret float %r
+}
+
+define double @log1p_nan() {
+; CHECK-LABEL: define double @log1p_nan() {
+; CHECK-NEXT:    [[R:%.*]] = call double @log1p(double 0x7FF8000000000000)
+; CHECK-NEXT:    ret double [[R]]
+;
+  %r = call double @log1p(double 0x7FF8000000000000)
+  ret double %r
+}
+
+define float @log1pf_poison() {
+; CHECK-LABEL: define float @log1pf_poison() {
+; CHECK-NEXT:    [[R:%.*]] = call float @log1pf(float poison)
+; CHECK-NEXT:    ret float [[R]]
+;
+  %r = call float @log1pf(float poison)
+  ret float %r
+}
+
+define double @log1p_poison() {
+; CHECK-LABEL: define double @log1p_poison() {
+; CHECK-NEXT:    [[R:%.*]] = call double @log1p(double poison)
+; CHECK-NEXT:    ret double [[R]]
+;
+  %r = call double @log1p(double poison)
+  ret double %r
+}
+
----------------
arsenm wrote:

Test memory none special cases 

https://github.com/llvm/llvm-project/pull/112113