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authorBill Wendling <isanbard@gmail.com>2018-12-18 22:54:03 +0000
committerBill Wendling <isanbard@gmail.com>2018-12-18 22:54:03 +0000
commitaa77513bb99775fb44eddea9ace0d45a55aaf802 (patch)
tree56d5b393aae357dfc3f81b59ad82350eb141c293 /clang/test
parentbb3d3a8f2ed5af0c080970ec8f3bcb39303f6566 (diff)
downloadbcm5719-llvm-aa77513bb99775fb44eddea9ace0d45a55aaf802.tar.gz
bcm5719-llvm-aa77513bb99775fb44eddea9ace0d45a55aaf802.zip
Emit ASM input in a constant context
Summary: Some ASM input constraints (e.g., "i" and "n") require immediate values. At O0, very few code transformations are performed. So if we cannot resolve to an immediate when emitting the ASM input we shouldn't delay its processing. Reviewers: rsmith, efriedma Reviewed By: efriedma Subscribers: rehana, efriedma, craig.topper, jyknight, cfe-commits Differential Revision: https://reviews.llvm.org/D55616 llvm-svn: 349561
Diffstat (limited to 'clang/test')
-rw-r--r--clang/test/CodeGen/builtin-constant-p.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/clang/test/CodeGen/builtin-constant-p.c b/clang/test/CodeGen/builtin-constant-p.c
index 7f4e7d07cc6..f1cd06ad4aa 100644
--- a/clang/test/CodeGen/builtin-constant-p.c
+++ b/clang/test/CodeGen/builtin-constant-p.c
@@ -1,4 +1,5 @@
// RUN: %clang_cc1 -triple x86_64-unknown-unknown -emit-llvm -o - %s -O2 | FileCheck %s
+// RUN: %clang_cc1 -triple x86_64-unknown-unknown -emit-llvm -o - %s -O0 | FileCheck --check-prefix=O0 %s
int a = 42;
@@ -166,3 +167,13 @@ struct { const char *t; int a; } test15[] = {
extern char test16_v;
struct { int a; } test16 = { __builtin_constant_p(test16_v) };
+
+extern unsigned long long test17_v;
+
+void test17() {
+ // O0: define void @test17
+ // O0: call void asm sideeffect "", {{.*}}(i32 -1)
+ // CHECK: define void @test17
+ // CHECK: call void asm sideeffect "", {{.*}}(i32 -1)
+ __asm__ __volatile__("" :: "n"( (__builtin_constant_p(test17_v) || 0) ? 1 : -1));
+}
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