If fast-isel fails, remove dead instructions generated during the failed

[oota-llvm.git] / test / CodeGen / ARM / fast-isel-deadcode.ll

diff --git a/test/CodeGen/ARM/fast-isel-deadcode.ll b/test/CodeGen/ARM/fast-isel-deadcode.ll
new file mode 100644 (file)
index 0000000..028d940
--- /dev/null
+++ b/test/CodeGen/ARM/fast-isel-deadcode.ll
@@ -0,0 +1,23 @@
+; RUN: llc < %s -O0 -relocation-model=dynamic-no-pic -mtriple=thumbv7-apple-darwin | FileCheck %s --check-prefix=THUMB
+
+; Target-specific selector can't properly handle the double because it isn't
+; being passed via a register, so the materialized arguments become dead code.
+
+define i32 @main(i32 %argc, i8** %argv) nounwind {
+entry:
+; THUMB: main
+  call void @printArgsNoRet(i32 1, float 0x4000CCCCC0000000, i8 signext 99, double 4.100000e+00)
+; THUMB: blx _printArgsNoRet
+; THUMB-NOT: ldr
+; THUMB-NOT: vldr
+; THUMB-NOT: vmov
+; THUMB-NOT: ldr
+; THUMB-NOT: sxtb
+; THUMB: movs r0, #0
+; THUMB: movt r0, #0
+; THUMB: add sp, #32
+; THUMb: pop {r7, pc}
+  ret i32 0
+}
+
+declare void @printArgsNoRet(i32 %a1, float %a2, i8 signext %a3, double %a4)