1 files changed, 60 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..bf53825
--- /dev/null
+++ b/test/CodeGen/X86/trunc-to-bool.ll
@@ -0,0 +1,60 @@
+; An integer truncation to i1 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 | grep {\\(and\\)\\|\\(test.*\\\$1\\)} | \
+; RUN:   wc -l | grep 6
+
+define i1 @test1(i32 %X) zext {
+    %Y = trunc i32 %X to i1
+    ret i1 %Y
+}
+
+define i1 @test2(i32 %val, i32 %mask) {
+entry:
+    %shifted = ashr i32 %val, %mask
+    %anded = and i32 %shifted, 1
+    %trunced = trunc i32 %anded to i1
+    br i1 %trunced, label %ret_true, label %ret_false
+ret_true:
+    ret i1 true
+ret_false:
+    ret i1 false
+}
+
+define i32 @test3(i8* %ptr) {
+    %val = load i8* %ptr
+    %tmp = trunc i8 %val to i1
+    br i1 %tmp, label %cond_true, label %cond_false
+cond_true:
+    ret i32 21
+cond_false:
+    ret i32 42
+}
+
+define i32 @test4(i8* %ptr) {
+    %tmp = ptrtoint i8* %ptr to i1
+    br i1 %tmp, label %cond_true, label %cond_false
+cond_true:
+    ret i32 21
+cond_false:
+    ret i32 42
+}
+
+define i32 @test5(float %f) {
+    %tmp = fptoui float %f to i1
+    br i1 %tmp, label %cond_true, label %cond_false
+cond_true:
+    ret i32 21
+cond_false:
+    ret i32 42
+}
+
+define i32 @test6(double %d) {
+    %tmp = fptosi double %d to i1
+    br i1 %tmp, label %cond_true, label %cond_false
+cond_true:
+    ret i32 21
+cond_false:
+    ret i32 42
+}
+