commit ec9a8c8b10f85a07037b2c7fc3d66d5fbd75c3d5
author Bob Wilson <bob.wilson@apple.com> Wed Nov 12 23:01:24 2014 +0000
committer Bob Wilson <bob.wilson@apple.com> Wed Nov 12 23:01:24 2014 +0000
tree 9fb0488ed391769d49d7d1de652a9334f060d586
parent 04348de5d397f03347f45280be2810d6f4ba4815

PR21518: Use unsigned arithmetic for trapping add/sub functions.

The code in {add,sub}v.i3 routines does not trap when it should, because
it performs the actual add/subtract operation in signed arithmetic,
rather than unsigned.

Patch by Francois-Xavie Coudert!

llvm-svn: 221826

compiler-rt/lib/builtins/addvdi3.c

diff --git a/compiler-rt/lib/builtins/addvdi3.c b/compiler-rt/lib/builtins/addvdi3.c
index db45a27..0da3894 100644
--- a/compiler-rt/lib/builtins/addvdi3.c
+++ b/compiler-rt/lib/builtins/addvdi3.c
@@ -21,7 +21,7 @@
 COMPILER_RT_ABI di_int
 __addvdi3(di_int a, di_int b)
 {
-    di_int s = a + b;
+    di_int s = (du_int) a + (du_int) b;
     if (b >= 0)
     {
         if (s < a)

compiler-rt/lib/builtins/addvsi3.c

diff --git a/compiler-rt/lib/builtins/addvsi3.c b/compiler-rt/lib/builtins/addvsi3.c
index 81f515c..94ca726 100644
--- a/compiler-rt/lib/builtins/addvsi3.c
+++ b/compiler-rt/lib/builtins/addvsi3.c
@@ -21,7 +21,7 @@
 COMPILER_RT_ABI si_int
 __addvsi3(si_int a, si_int b)
 {
-    si_int s = a + b;
+    si_int s = (su_int) a + (su_int) b;
     if (b >= 0)
     {
         if (s < a)

compiler-rt/lib/builtins/addvti3.c

diff --git a/compiler-rt/lib/builtins/addvti3.c b/compiler-rt/lib/builtins/addvti3.c
index 79b9611..c224de6 100644
--- a/compiler-rt/lib/builtins/addvti3.c
+++ b/compiler-rt/lib/builtins/addvti3.c
@@ -23,7 +23,7 @@
 COMPILER_RT_ABI ti_int
 __addvti3(ti_int a, ti_int b)
 {
-    ti_int s = a + b;
+    ti_int s = (tu_int) a + (tu_int) b;
     if (b >= 0)
     {
         if (s < a)

compiler-rt/lib/builtins/subvdi3.c

diff --git a/compiler-rt/lib/builtins/subvdi3.c b/compiler-rt/lib/builtins/subvdi3.c
index 0f1f924..71fc70f 100644
--- a/compiler-rt/lib/builtins/subvdi3.c
+++ b/compiler-rt/lib/builtins/subvdi3.c
@@ -21,7 +21,7 @@
 COMPILER_RT_ABI di_int
 __subvdi3(di_int a, di_int b)
 {
-    di_int s = a - b;
+    di_int s = (du_int) a - (du_int) b;
     if (b >= 0)
     {
         if (s > a)

compiler-rt/lib/builtins/subvsi3.c

diff --git a/compiler-rt/lib/builtins/subvsi3.c b/compiler-rt/lib/builtins/subvsi3.c
index ec4594c..e6c0fb6 100644
--- a/compiler-rt/lib/builtins/subvsi3.c
+++ b/compiler-rt/lib/builtins/subvsi3.c
@@ -21,7 +21,7 @@
 COMPILER_RT_ABI si_int
 __subvsi3(si_int a, si_int b)
 {
-    si_int s = a - b;
+    si_int s = (su_int) a - (su_int) b;
     if (b >= 0)
     {
         if (s > a)

compiler-rt/lib/builtins/subvti3.c

diff --git a/compiler-rt/lib/builtins/subvti3.c b/compiler-rt/lib/builtins/subvti3.c
index 8f11714..a6804d2 100644
--- a/compiler-rt/lib/builtins/subvti3.c
+++ b/compiler-rt/lib/builtins/subvti3.c
@@ -23,7 +23,7 @@
 COMPILER_RT_ABI ti_int
 __subvti3(ti_int a, ti_int b)
 {
-    ti_int s = a - b;
+    ti_int s = (tu_int) a - (tu_int) b;
     if (b >= 0)
     {
         if (s > a)