Restructure dead argument elimination, try #3 :-)

[oota-llvm.git] / test / Transforms / DeadArgElim / multdeadretval.ll

diff --git a/test/Transforms/DeadArgElim/multdeadretval.ll b/test/Transforms/DeadArgElim/multdeadretval.ll
index 2eca74dd7e966e2367c7db61657c576c3c01120f..f60fd0fc395333d37d0e08552248a213bbfe72a4 100644 (file)
--- a/test/Transforms/DeadArgElim/multdeadretval.ll
+++ b/test/Transforms/DeadArgElim/multdeadretval.ll
@@ -3,7 +3,6 @@
 ; run instcombine to fold insert/extractvalue chains and we run dce to clean up
 ; any remaining dead stuff.
 ; RUN: llvm-as < %s | opt -deadargelim -instcombine -dce | llvm-dis | not grep i16
-; XFAIL: *
 
 define internal {i16, i32} @test(i16 %DEADARG) {
         %A = insertvalue {i16,i32} undef, i16 1, 0
@@ -18,6 +17,8 @@ define internal {i32, i16} @test2() {
         ret {i32,i16} %B
 }
 
+; Dead argument, used to check if the second result of test2 is dead even when
+; it's used as a dead argument
 define internal i32 @test3(i16 %A) {
         %ret = call {i16, i32} @test( i16 %A )                ; <i32> [#uses=0]
         %DEAD = extractvalue {i16, i32} %ret, 0
@@ -29,6 +30,14 @@ define internal i16 @test4() {
         ret i16 0
 }
 
+; Multiple return values, multiple live return values
+define internal {i32, i32, i16} @test5() {
+        %A = insertvalue {i32,i32,i16} undef, i32 1, 0
+        %B = insertvalue {i32,i32,i16} %A, i32 2, 1
+        %C = insertvalue {i32,i32,i16} %B, i16 3, 2
+        ret {i32, i32, i16} %C
+}
+
 define i32 @main() {
         %ret = call {i32, i16} @test2()                ; <i32> [#uses=1]
         %LIVE = extractvalue {i32, i16} %ret, 0
@@ -36,5 +45,11 @@ define i32 @main() {
         %Y = add i32 %LIVE, -123           ; <i32> [#uses=1]
         %LIVE2 = call i32 @test3(i16 %DEAD)                ; <i32> [#uses=1]
         %Z = add i32 %LIVE2, %Y           ; <i32> [#uses=1]
-        ret i32 %Z
+        %ret1 = call { i32, i32, i16 } @test5 ()
+        %LIVE3 = extractvalue { i32, i32, i16} %ret1, 0
+        %LIVE4 = extractvalue { i32, i32, i16} %ret1, 1
+        %DEAD2 = extractvalue { i32, i32, i16} %ret1, 2
+        %V = add i32 %LIVE3, %LIVE4
+        %W = add i32 %Z, %V
+        ret i32 %W
 }