[ARM] Constant Materialize: imms with specific value can be encoded into mov.w

Summary: Thumb2 supports encoding immediates with specific patterns into mov.w by splatting the low 8 bits into other bytes.

I'm resubmitting this patch. The test case in the original commit
r277610 does not specify triple, so builds with differnt default triple
will have different output.

This patch fixed trile as thumb-darwin-apple.

Reviewers: john.brawn, jmolloy, bruno

Subscribers: jmolloy, aemerson, rengolin, samparker, llvm-commits

Differential Revision: https://reviews.llvm.org/D23090

llvm-svn: 277865

1 files changed, 57 insertions, 3 deletions

diff --git a/llvm/test/CodeGen/ARM/subtarget-no-movt.ll b/llvm/test/CodeGen/ARM/subtarget-no-movt.ll
index cb61bde3f9c..da535bca069 100644
--- a/llvm/test/CodeGen/ARM/subtarget-no-movt.ll
+++ b/llvm/test/CodeGen/ARM/subtarget-no-movt.ll
@@ -1,24 +1,40 @@
 ; RUN: llc -march thumb -mcpu=cortex-a8 -relocation-model=static %s -o - | FileCheck -check-prefix=NO-OPTION %s
 ; RUN: llc -march thumb -mcpu=cortex-a8 -relocation-model=static %s -o - -mattr=-no-movt | FileCheck -check-prefix=USE-MOVT %s
 ; RUN: llc -march thumb -mcpu=cortex-a8 -relocation-model=static %s -o - -mattr=+no-movt | FileCheck -check-prefix=NO-USE-MOVT %s
-; RUN: llc -march thumb -mcpu=cortex-a8 -relocation-model=static %s -o - -O0 | FileCheck -check-prefix=NO-OPTION %s
-; RUN: llc -march thumb -mcpu=cortex-a8 -relocation-model=static %s -o - -O0 -mattr=-no-movt | FileCheck -check-prefix=USE-MOVT %s
-; RUN: llc -march thumb -mcpu=cortex-a8 -relocation-model=static %s -o - -O0 -mattr=+no-movt | FileCheck -check-prefix=NO-USE-MOVT %s
+; RUN: llc -march thumb -mcpu=cortex-a8 -relocation-model=static %s -o - -O0 | FileCheck -check-prefix=NO-OPTION-O0 %s
+; RUN: llc -march thumb -mcpu=cortex-a8 -relocation-model=static %s -o - -O0 -mattr=-no-movt | FileCheck -check-prefix=USE-MOVT-O0 %s
+; RUN: llc -march thumb -mcpu=cortex-a8 -relocation-model=static %s -o - -O0 -mattr=+no-movt | FileCheck -check-prefix=NO-USE-MOVT-O0 %s
+
+target triple = "thumb-apple-darwin"
 
 ; NO-OPTION-LABEL: {{_?}}foo0
 ; NO-OPTION: ldr [[R0:r[0-9]+]], [[L0:.*]]
 ; NO-OPTION: [[L0]]:
 ; NO-OPTION: .long 2296237089
 
+; NO-OPTION-O0-LABEL: {{_?}}foo0
+; NO-OPTION-O0: ldr [[R0:r[0-9]+]], [[L0:.*]]
+; NO-OPTION-O0: [[L0]]:
+; NO-OPTION-O0: .long 2296237089
+
 ; USE-MOVT-LABEL: {{_?}}foo0
 ; USE-MOVT: movw [[R0:r[0-9]+]], #52257
 ; USE-MOVT: movt [[R0]], #35037
 
+; USE-MOVT-O0-LABEL: {{_?}}foo0
+; USE-MOVT-O0: movw [[R0:r[0-9]+]], #52257
+; USE-MOVT-O0: movt [[R0]], #35037
+
 ; NO-USE-MOVT-LABEL: {{_?}}foo0
 ; NO-USE-MOVT: ldr [[R0:r[0-9]+]], [[L0:.*]]
 ; NO-USE-MOVT: [[L0]]:
 ; NO-USE-MOVT: .long 2296237089
 
+; NO-USE-MOVT-O0-LABEL: {{_?}}foo0
+; NO-USE-MOVT-O0: ldr [[R0:r[0-9]+]], [[L0:.*]]
+; NO-USE-MOVT-O0: [[L0]]:
+; NO-USE-MOVT-O0: .long 2296237089
+
 define i32 @foo0(i32 %a) #0 {
   %1 = xor i32 -1998730207, %a
   ret i32 %1
@@ -28,18 +44,56 @@ define i32 @foo0(i32 %a) #0 {
 ; NO-OPTION: movw [[R0:r[0-9]+]], #52257
 ; NO-OPTION: movt [[R0]], #35037
 
+; NO-OPTION-O0-LABEL: {{_?}}foo1
+; NO-OPTION-O0: movw [[R0:r[0-9]+]], #52257
+; NO-OPTION-O0: movt [[R0]], #35037
+
 ; USE-MOVT-LABEL: {{_?}}foo1
 ; USE-MOVT: movw [[R0:r[0-9]+]], #52257
 ; USE-MOVT: movt [[R0]], #35037
 
+; USE-MOVT-O0-LABEL: {{_?}}foo1
+; USE-MOVT-O0: movw [[R0:r[0-9]+]], #52257
+; USE-MOVT-O0: movt [[R0]], #35037
+
 ; NO-USE-MOVT-LABEL: {{_?}}foo1
 ; NO-USE-MOVT: ldr [[R0:r[0-9]+]], [[L0:.*]]
 ; NO-USE-MOVT: [[L0]]:
 ; NO-USE-MOVT: .long 2296237089
 
+; NO-USE-MOVT-O0-LABEL: {{_?}}foo1
+; NO-USE-MOVT-O0: ldr [[R0:r[0-9]+]], [[L0:.*]]
+; NO-USE-MOVT-O0: [[L0]]:
+; NO-USE-MOVT-O0: .long 2296237089
+
 define i32 @foo1(i32 %a) {
   %1 = xor i32 -1998730207, %a
   ret i32 %1
 }
 
+; NO-OPTION-LABEL: {{_?}}foo2
+; NO-OPTION:   mov.w	[[R0:r[0-9]+]], #-536813568
+
+; USE-MOVT-LABEL: {{_?}}foo2
+; USE-MOVT:    mov.w	[[R0:r[0-9]+]], #-536813568
+
+; NO-USE-MOVT-LABEL: {{_?}}foo2
+; NO-USE-MOVT: mov.w	[[R0:r[0-9]+]], #-536813568
+
+; NO-OPTION-O0-LABEL: {{_?}}foo2
+; NO-OPTION-O0: movw	[[R0:r[0-9]+]], #57344
+; NO-OPTION-O0: movt	[[R0]], #57344
+
+; USE-MOVT-O0-LABEL: {{_?}}foo2
+; USE-MOVT-O0:  movw	[[R0:r[0-9]+]], #57344
+; USE-MOVTT-O0: movt	[[R0]], #57344
+
+; NO-USE-MOVT-O0-LABEL: {{_?}}foo2
+; NO-USE-MOVT-O0: ldr [[R0:r[0-9]+]], [[L0:.*]]
+; NO-USE-MOVT-O0: [[L0]]:
+; NO-USE-MOVT-O0: .long 3758153728     @ 0xe000e000
+define i32 @foo2() {
+  %1 = load i32, i32* inttoptr (i32 -536813568 to i32*) ; load from 0xe000e000
+  ret i32 %1
+}
 attributes #0 = { "target-features"="+no-movt" }