diff options
Diffstat (limited to 'test/CodeGen/catch-undef-behavior.c')
-rw-r--r-- | test/CodeGen/catch-undef-behavior.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/test/CodeGen/catch-undef-behavior.c b/test/CodeGen/catch-undef-behavior.c index 8c45fa5045..5832b6c830 100644 --- a/test/CodeGen/catch-undef-behavior.c +++ b/test/CodeGen/catch-undef-behavior.c @@ -19,3 +19,28 @@ int bar(int *a) { // CHECK-NEXT: icmp eq i64 %[[MISALIGN]], 0 return *a; } + +// CHECK: @lsh_overflow +int lsh_overflow(int a, int b) { + // CHECK: %[[INBOUNDS:.*]] = icmp ule i32 %[[RHS:.*]], 31 + // CHECK-NEXT: br i1 %[[INBOUNDS]] + + // CHECK: %[[SHIFTED_OUT_WIDTH:.*]] = sub nuw nsw i32 31, %[[RHS]] + // CHECK-NEXT: %[[SHIFTED_OUT:.*]] = lshr i32 %[[LHS:.*]], %[[SHIFTED_OUT_WIDTH]] + // CHECK-NEXT: %[[NO_OVERFLOW:.*]] = icmp eq i32 %[[SHIFTED_OUT]], 0 + // CHECK-NEXT: br i1 %[[NO_OVERFLOW]] + + // CHECK: %[[RET:.*]] = shl i32 %[[LHS]], %[[RHS]] + // CHECK-NEXT: ret i32 %[[RET]] + return a << b; +} + +// CHECK: @rsh_inbounds +int rsh_inbounds(int a, int b) { + // CHECK: %[[INBOUNDS:.*]] = icmp ult i32 %[[RHS:.*]], 32 + // CHECK: br i1 %[[INBOUNDS]] + + // CHECK: %[[RET:.*]] = ashr i32 %[[LHS]], %[[RHS]] + // CHECK-NEXT: ret i32 %[[RET]] + return a >> b; +} |