For PR950:

The long awaited CAST patch. This introduces 12 new instructions into LLVM
to replace the cast instruction. Corresponding changes throughout LLVM are
provided. This passes llvm-test, llvm/test, and SPEC CPUINT2000 with the
exception of 175.vpr which fails only on a slight floating point output
difference.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31931 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 32 insertions, 0 deletions

diff --git a/test/CodeGen/X86/trunc-to-bool.ll b/test/CodeGen/X86/trunc-to-bool.ll
new file mode 100644
index 0000000..693b94c
--- /dev/null
+++ b/test/CodeGen/X86/trunc-to-bool.ll
@@ -0,0 +1,32 @@
+; An integer truncation to bool should be done with an and instruction to make
+; sure only the LSBit survives. Test that this is the case both for a returned
+; value and as the operand of a branch.
+; RUN: llvm-as < %s | llc -march=x86 &&
+; RUN: llvm-as < %s | llc -march=x86 | grep '\(and\)\|\(test.*1\)' | wc -l | grep 3
+bool %test1(int %X) {
+    %Y = trunc int %X to bool
+    ret bool %Y
+}
+
+bool %test2(int %val, int %mask) {
+entry:
+    %mask     = trunc int %mask to ubyte
+    %shifted  = ashr int %val, ubyte %mask
+    %anded    = and int %shifted, 1
+    %trunced  = trunc int %anded to bool
+    br bool %trunced, label %ret_true, label %ret_false
+ret_true:
+    ret bool true
+ret_false:
+    ret bool false
+}
+
+int %test3(sbyte* %ptr) {
+    %val = load sbyte* %ptr
+    %tmp = trunc sbyte %val to bool             ; %<bool> [#uses=1]
+    br bool %tmp, label %cond_true, label %cond_false
+cond_true:
+    ret int 21
+cond_false:
+    ret int 42
+}