Fix bug in lowering of DYNAMIC_STACKALLOC nodes. The correct offset of the

dynamically allocated stack area was not set.




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132758 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 75 insertions, 6 deletions

diff --git a/test/CodeGen/Mips/alloca.ll b/test/CodeGen/Mips/alloca.ll
index 50eeecf..ff503ec 100644
--- a/test/CodeGen/Mips/alloca.ll
+++ b/test/CodeGen/Mips/alloca.ll
@@ -4,15 +4,15 @@ define i32 @twoalloca(i32 %size) nounwind {
 entry:
 ; CHECK: subu  $[[T0:[0-9]+]], $sp, $[[SZ:[0-9]+]]
 ; CHECK: addu  $sp, $zero, $[[T0]]
-; CHECK: addu  $[[SP1:[0-9]+]], $zero, $sp
-; CHECK: subu  $[[T1:[0-9]+]], $sp, $[[SZ]]
-; CHECK: addu  $sp, $zero, $[[T1]]
-; CHECK: addu  $[[SP2:[0-9]+]], $zero, $sp
+; CHECK: addiu $[[T1:[0-9]+]], $sp, [[OFF:[0-9]+]]
+; CHECK: subu  $[[T2:[0-9]+]], $sp, $[[SZ]]
+; CHECK: addu  $sp, $zero, $[[T2]]
+; CHECK: addiu $[[T3:[0-9]+]], $sp, [[OFF]]
 ; CHECK: lw  $25, %call16(foo)($gp)
-; CHECK: addiu $4, $[[SP1]], 24
+; CHECK: addu $4, $zero, $[[T1]]
 ; CHECK: jalr  $25
 ; CHECK: lw  $25, %call16(foo)($gp)
-; CHECK: addiu $4, $[[SP2]], 24
+; CHECK: addu $4, $zero, $[[T3]]
 ; CHECK: jalr  $25
   %tmp1 = alloca i8, i32 %size, align 4
   %add.ptr = getelementptr inbounds i8* %tmp1, i32 5
@@ -29,3 +29,72 @@ declare void @foo2(double, double, i32)
 
 declare i32 @foo(i8*)
 
+@.str = private unnamed_addr constant [22 x i8] c"%d %d %d %d %d %d %d\0A\00", align 1
+
+define i32 @alloca2(i32 %size) nounwind {
+entry:
+; dynamic allocated stack area and $gp restore slot have the same offsets
+; relative to $sp.
+;
+; CHECK: alloca2
+; CHECK: .cprestore [[OFF:[0-9]+]]
+; CHECK: subu  $[[T0:[0-9]+]], $sp, $[[SZ:[0-9]+]]
+; CHECK: addu  $sp, $zero, $[[T0]]
+; CHECK: addiu $[[T1:[0-9]+]], $sp, [[OFF]]
+
+  %tmp1 = alloca i8, i32 %size, align 4
+  %0 = bitcast i8* %tmp1 to i32*
+  %cmp = icmp sgt i32 %size, 10
+  br i1 %cmp, label %if.then, label %if.else
+
+if.then:                                          ; preds = %entry
+; CHECK: addiu $4, $[[T1]], 40
+
+  %add.ptr = getelementptr inbounds i8* %tmp1, i32 40
+  %1 = bitcast i8* %add.ptr to i32*
+  call void @foo3(i32* %1) nounwind
+  %arrayidx15.pre = getelementptr inbounds i8* %tmp1, i32 12
+  %.pre = bitcast i8* %arrayidx15.pre to i32*
+  br label %if.end
+
+if.else:                                          ; preds = %entry
+; CHECK: addiu $4, $[[T1]], 12
+
+  %add.ptr5 = getelementptr inbounds i8* %tmp1, i32 12
+  %2 = bitcast i8* %add.ptr5 to i32*
+  call void @foo3(i32* %2) nounwind
+  br label %if.end
+
+if.end:                                           ; preds = %if.else, %if.then
+; CHECK: lw  $5, 0($[[T1]])
+; CHECK: lw  $25, %call16(printf)
+
+  %.pre-phi = phi i32* [ %2, %if.else ], [ %.pre, %if.then ]
+  %tmp7 = load i32* %0, align 4, !tbaa !0
+  %arrayidx9 = getelementptr inbounds i8* %tmp1, i32 4
+  %3 = bitcast i8* %arrayidx9 to i32*
+  %tmp10 = load i32* %3, align 4, !tbaa !0
+  %arrayidx12 = getelementptr inbounds i8* %tmp1, i32 8
+  %4 = bitcast i8* %arrayidx12 to i32*
+  %tmp13 = load i32* %4, align 4, !tbaa !0
+  %tmp16 = load i32* %.pre-phi, align 4, !tbaa !0
+  %arrayidx18 = getelementptr inbounds i8* %tmp1, i32 16
+  %5 = bitcast i8* %arrayidx18 to i32*
+  %tmp19 = load i32* %5, align 4, !tbaa !0
+  %arrayidx21 = getelementptr inbounds i8* %tmp1, i32 20
+  %6 = bitcast i8* %arrayidx21 to i32*
+  %tmp22 = load i32* %6, align 4, !tbaa !0
+  %arrayidx24 = getelementptr inbounds i8* %tmp1, i32 24
+  %7 = bitcast i8* %arrayidx24 to i32*
+  %tmp25 = load i32* %7, align 4, !tbaa !0
+  %call = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([22 x i8]* @.str, i32 0, i32 0), i32 %tmp7, i32 %tmp10, i32 %tmp13, i32 %tmp16, i32 %tmp19, i32 %tmp22, i32 %tmp25) nounwind
+  ret i32 0
+}
+
+declare void @foo3(i32*)
+
+declare i32 @printf(i8* nocapture, ...) nounwind
+
+!0 = metadata !{metadata !"int", metadata !1}
+!1 = metadata !{metadata !"omnipotent char", metadata !2}
+!2 = metadata !{metadata !"Simple C/C++ TBAA", null}