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Diffstat (limited to 'test/CodeGen/ARM/select.ll')
| -rw-r--r-- | test/CodeGen/ARM/select.ll | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/test/CodeGen/ARM/select.ll b/test/CodeGen/ARM/select.ll index 29c55c6..7413bed 100644 --- a/test/CodeGen/ARM/select.ll +++ b/test/CodeGen/ARM/select.ll @@ -1,5 +1,6 @@ ; RUN: llc < %s -march=arm | FileCheck %s ; RUN: llc < %s -march=arm -mattr=+vfp2 | FileCheck %s --check-prefix=CHECK-VFP +; RUN: llc < %s -mattr=+neon,+thumb2 -mtriple=thumbv7-apple-darwin | FileCheck %s --check-prefix=CHECK-NEON define i32 @f1(i32 %a.s) { ;CHECK: f1: @@ -65,3 +66,27 @@ define double @f7(double %a, double %b) { %tmp1 = select i1 %tmp, double -1.000e+00, double %b ret double %tmp1 } + +; <rdar://problem/7260094> +; +; We used to generate really horrible code for this function. The main cause was +; a lack of a custom lowering routine for an ISD::SELECT. This would result in +; two "it" blocks in the code: one for the "icmp" and another to move the index +; into the constant pool based on the value of the "icmp". If we have one "it" +; block generated, odds are good that we have close to the ideal code for this: +; +; CHECK-NEON: _f8: +; CHECK-NEON: movw [[REGISTER_1:r[0-9]+]], #1123 +; CHECK-NEON-NEXT: movs [[REGISTER_2:r[0-9]+]], #0 +; CHECK-NEON-NEXT: cmp r0, [[REGISTER_1]] +; CHECK-NEON-NEXT: adr [[REGISTER_3:r[0-9]+]], #LCPI +; CHECK-NEON-NEXT: it eq +; CHECK-NEON-NEXT: moveq [[REGISTER_2]], #4 +; CHECK-NEON-NEXT: ldr +; CHECK-NEON: bx + +define arm_apcscc float @f8(i32 %a) nounwind { + %tmp = icmp eq i32 %a, 1123 + %tmp1 = select i1 %tmp, float 0x3FF3BE76C0000000, float 0x40030E9A20000000 + ret float %tmp1 +} |
