From dcb0422f25231f1b375943a0956c46b01c900375 Mon Sep 17 00:00:00 2001
From: Reed Kotler <rkotler@mips.com>
Date: Fri, 29 Nov 2013 22:32:56 +0000
Subject: Part 1 of 3 patches that completes very long conditional branches in
 constant islands for Mips16. We introdcuce JalB16 as a synomnym for Jal16. It
 makes it easier to read and is also necessary because Jal16 is a call
 instruction but JalB16 is being used as a branch. Various parts of LLVM will
 not work properly even in this late stage of the backend if we use what was
 declared as a call instruction to function as a branch. For one, basic block
 labels may not get emitted in some situations.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195968 91177308-0d34-0410-b5e6-96231b3b80d8
---
 test/CodeGen/Mips/lcb3c.ll | 59 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 59 insertions(+)
 create mode 100644 test/CodeGen/Mips/lcb3c.ll

(limited to 'test')

diff --git a/test/CodeGen/Mips/lcb3c.ll b/test/CodeGen/Mips/lcb3c.ll
new file mode 100644
index 0000000000..72a0b8cf5c
--- /dev/null
+++ b/test/CodeGen/Mips/lcb3c.ll
@@ -0,0 +1,59 @@
+; RUN: llc -mtriple=mipsel-linux-gnu -march=mipsel -mcpu=mips16 -soft-float -mips16-hard-float -relocation-model=static -O0    < %s | FileCheck %s -check-prefix=lcb
+
+@i = global i32 0, align 4
+@j = common global i32 0, align 4
+@k = common global i32 0, align 4
+
+; Function Attrs: nounwind
+define i32 @s() #0 {
+entry:
+  %0 = load i32* @i, align 4
+  %cmp = icmp eq i32 %0, 0
+  br i1 %cmp, label %if.then, label %if.else
+
+if.then:                                          ; preds = %entry
+  store i32 0, i32* @i, align 4
+  call void asm sideeffect ".space 1000", ""() #1, !srcloc !1
+  br label %if.end
+
+if.else:                                          ; preds = %entry
+  store i32 1, i32* @i, align 4
+  br label %if.end
+
+if.end:                                           ; preds = %if.else, %if.then
+  ret i32 0
+; lcb:	bnez	$2, $BB0_2
+; lcb:	b	$BB0_1 # 16 bit inst
+; lcb: $BB0_1:                                 # %if.then
+}
+
+; Function Attrs: nounwind
+define i32 @b() #0 {
+entry:
+  %0 = load i32* @i, align 4
+  %cmp = icmp eq i32 %0, 0
+  br i1 %cmp, label %if.then, label %if.else
+
+if.then:                                          ; preds = %entry
+  store i32 0, i32* @i, align 4
+  call void asm sideeffect ".space 1000000", ""() #1, !srcloc !2
+  br label %if.end
+
+if.else:                                          ; preds = %entry
+  store i32 1, i32* @i, align 4
+  br label %if.end
+
+if.end:                                           ; preds = %if.else, %if.then
+  ret i32 0
+}
+
+; lcb:	beqz	$2, $BB1_1  # 16 bit inst
+; lcb:	jal	$BB1_2	# branch
+; lcb: $BB1_1:                                 # %if.then
+
+attributes #0 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #1 = { nounwind }
+
+
+!1 = metadata !{i32 65}
+!2 = metadata !{i32 167}
-- 
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