implement large (>16 bit) constant loading.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166749 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/Mips/Mips16InstrInfo.td b/lib/Target/Mips/Mips16InstrInfo.td
index c4949ce7199ee8c4aa0b34cbc3dc6305fec7b85e..74ddc99e13975b88ab94bd55f3be7cef3118d738 100644 (file)
--- a/lib/Target/Mips/Mips16InstrInfo.td
+++ b/lib/Target/Mips/Mips16InstrInfo.td
@@ -971,6 +971,10 @@ class SetCC_I16<PatFrag cond_op, PatLeaf imm_type, Instruction I>:
   Mips16Pat<(cond_op CPU16Regs:$rx, imm_type:$imm16),
             (I CPU16Regs:$rx, imm_type:$imm16)>;
 
+// Large (>16 bit) immediate loads
+def : Mips16Pat<(i32 imm:$imm),
+                (OrRxRxRy16 (SllX16 (LiRxImmX16 (HI16 imm:$imm)), 16),
+                (LiRxImmX16 (LO16 imm:$imm)))>;
 
 //
 // Some branch conditional patterns are not generated by llvm at this time.

diff --git a/test/CodeGen/Mips/i32k.ll b/test/CodeGen/Mips/i32k.ll
new file mode 100644 (file)
index 0000000..c6da8b1
--- /dev/null
+++ b/test/CodeGen/Mips/i32k.ll
@@ -0,0 +1,17 @@
+; RUN: llc  -march=mipsel -mcpu=mips16 -relocation-model=pic -O3 < %s | FileCheck %s -check-prefix=16a
+; RUN: llc  -march=mipsel -mcpu=mips16 -relocation-model=pic -O3 < %s | FileCheck %s -check-prefix=16b
+
+@.str = private unnamed_addr constant [4 x i8] c"%i\0A\00", align 1
+
+define i32 @main() nounwind {
+entry:
+  %call = tail call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([4 x i8]* @.str, i32 0, i32 0), i32 1075344593) nounwind
+; 16a: li      ${{[0-9]+}}, 29905
+; 16b: li      ${{[0-9]+}}, 16408
+  %call1 = tail call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([4 x i8]* @.str, i32 0, i32 0), i32 -1075344593) nounwind
+; 16a: li      ${{[0-9]+}}, 49127
+; 16b: li      ${{[0-9]+}}, 35631
+  ret i32 0
+}
+
+declare i32 @printf(i8* nocapture, ...) nounwind