[clang] [compiler-rt] [ubsan] Display correct runtime messages for negative _BitInt (PR #96240)

[via llvm-commits]

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@@ -0,0 +1,174 @@
+// RUN: %clang -Wno-constant-conversion -Wno-array-bounds -Wno-division-by-zero -Wno-shift-negative-value -Wno-shift-count-negative -Wno-int-to-pointer-cast -O0 -fsanitize=alignment,array-bounds,bool,float-cast-overflow,implicit-integer-sign-change,implicit-signed-integer-truncation,implicit-unsigned-integer-truncation,integer-divide-by-zero,nonnull-attribute,null,nullability-arg,nullability-assign,nullability-return,pointer-overflow,returns-nonnull-attribute,shift-base,shift-exponent,signed-integer-overflow,unreachable,unsigned-integer-overflow,unsigned-shift-base,vla-bound %s -o %t1 && %run %t1 2>&1 | FileCheck %s --check-prefix=RUNTIME
+// RUN: %clang -Wno-constant-conversion -Wno-array-bounds -Wno-division-by-zero -Wno-shift-negative-value -Wno-shift-count-negative -Wno-int-to-pointer-cast -fsanitize=array-bounds,enum,float-cast-overflow,integer-divide-by-zero,implicit-unsigned-integer-truncation,implicit-signed-integer-truncation,implicit-integer-sign-change,unsigned-integer-overflow,signed-integer-overflow,shift-base,shift-exponent -O0 -S -emit-llvm -o - %s | FileCheck %s --check-prefix=IR
+
+#include <stdint.h>
+#include <stdio.h>
+
+uint32_t float_divide_by_zero() {
+  float f = 1.0f / 0.0f;
+  // IR: constant { i16, i16, [8 x i8] } { i16 1, i16 32, [8 x i8] c"'float'\00" }
+  _BitInt(37) r = (_BitInt(37))f;
+  // RUNTIME: {{.*}}bit-int.c:[[@LINE-1]]:19: runtime error: inf is outside the range of representable values of type
+  // IR: constant { i16, i16, [20 x i8] } { i16 2, i16 13, [20 x i8] c"'_BitInt(37)'\00%\00\00\00\00\00" }
+  return r;
+}
+
+uint32_t integer_divide_by_zero() __attribute__((no_sanitize("memory"))) {
+  _BitInt(37) x = 1 / 0;
+  // RUNTIME: {{.*}}bit-int.c:[[@LINE-1]]:21: runtime error: division by zero
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earnol wrote:

Accepted.

https://github.com/llvm/llvm-project/pull/96240