1 files changed, 94 insertions, 0 deletions
diff --git a/test/Instrumentation/MemorySanitizer/mul_by_constant.ll b/test/Instrumentation/MemorySanitizer/mul_by_constant.ll
new file mode 100644
index 0000000..e068f69
--- /dev/null
+++ b/test/Instrumentation/MemorySanitizer/mul_by_constant.ll
@@ -0,0 +1,94 @@
+; RUN: opt < %s -msan -msan-check-access-address=0 -S | FileCheck %s
+
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+; Check instrumentation mul when one of the operands is a constant.
+
+define i64 @MulConst(i64 %x) sanitize_memory {
+entry:
+  %y = mul i64 %x, 42949672960000
+  ret i64 %y
+}
+
+; 42949672960000 = 2**32 * 10000
+; 36 trailing zero bits
+; 68719476736 = 2**36
+
+; CHECK-LABEL: @MulConst(
+; CHECK: [[A:%.*]] = load {{.*}} @__msan_param_tls
+; CHECK: [[B:%.*]] = mul i64 [[A]], 68719476736
+; CHECK: store i64 [[B]], i64* {{.*}} @__msan_retval_tls
+
+
+define i64 @MulZero(i64 %x) sanitize_memory {
+entry:
+  %y = mul i64 %x, 0
+  ret i64 %y
+}
+
+; CHECK-LABEL: @MulZero(
+; CHECK: [[A:%.*]] = load {{.*}} @__msan_param_tls
+; CHECK: [[B:%.*]] = mul i64 [[A]], 0{{$}}
+; CHECK: store i64 [[B]], i64* {{.*}} @__msan_retval_tls
+
+
+define i64 @MulNeg(i64 %x) sanitize_memory {
+entry:
+  %y = mul i64 %x, -16
+  ret i64 %y
+}
+
+; CHECK-LABEL: @MulNeg(
+; CHECK: [[A:%.*]] = load {{.*}} @__msan_param_tls
+; CHECK: [[B:%.*]] = mul i64 [[A]], 16
+; CHECK: store i64 [[B]], i64* {{.*}} @__msan_retval_tls
+
+
+define i64 @MulNeg2(i64 %x) sanitize_memory {
+entry:
+  %y = mul i64 %x, -48
+  ret i64 %y
+}
+
+; CHECK-LABEL: @MulNeg2(
+; CHECK: [[A:%.*]] = load {{.*}} @__msan_param_tls
+; CHECK: [[B:%.*]] = mul i64 [[A]], 16
+; CHECK: store i64 [[B]], i64* {{.*}} @__msan_retval_tls
+
+
+define i64 @MulOdd(i64 %x) sanitize_memory {
+entry:
+  %y = mul i64 %x, 12345
+  ret i64 %y
+}
+
+; CHECK-LABEL: @MulOdd(
+; CHECK: [[A:%.*]] = load {{.*}} @__msan_param_tls
+; CHECK: [[B:%.*]] = mul i64 [[A]], 1
+; CHECK: store i64 [[B]], i64* {{.*}} @__msan_retval_tls
+
+
+define i64 @MulLarge(i64 %x) sanitize_memory {
+entry:
+  %y = mul i64 %x, -9223372036854775808
+  ret i64 %y
+}
+
+; -9223372036854775808 = 0x7000000000000000
+
+; CHECK-LABEL: @MulLarge(
+; CHECK: [[A:%.*]] = load {{.*}} @__msan_param_tls
+; CHECK: [[B:%.*]] = mul i64 [[A]], -9223372036854775808
+; CHECK: store i64 [[B]], i64* {{.*}} @__msan_retval_tls
+
+define <4 x i32> @MulVectorConst(<4 x i32> %x) sanitize_memory {
+entry:
+  %y = mul <4 x i32> %x, <i32 3072, i32 0, i32 -16, i32 -48>
+  ret <4 x i32> %y
+}
+
+; CHECK-LABEL: @MulVectorConst(
+; CHECK: [[A:%.*]] = load {{.*}} @__msan_param_tls
+; CHECK: [[B:%.*]] = mul <4 x i32> [[A]], <i32 1024, i32 0, i32 16, i32 16>
+; CHECK: store <4 x i32> [[B]], <4 x i32>* {{.*}} @__msan_retval_tls