Merging r259342 (with s/p2align 4/align 16) because r258750 is not in 3.8.

[oota-llvm.git] / test / CodeGen / X86 / narrow-shl-load.ll

diff --git a/test/CodeGen/X86/narrow-shl-load.ll b/test/CodeGen/X86/narrow-shl-load.ll
index 53b03884a58c76126a297e035c9e65bd484ccd42..9dc0d749cb238b0622d704c3c0a7120f7a169ab7 100644 (file)
--- a/test/CodeGen/X86/narrow-shl-load.ll
+++ b/test/CodeGen/X86/narrow-shl-load.ll
@@ -6,12 +6,12 @@ target triple = "x86_64-pc-linux-gnu"
 ; DAGCombiner should fold this code in finite time.
 ; rdar://8606584
 
-define void @D() nounwind readnone {
+define void @test1() nounwind readnone {
 bb.nph:
   br label %while.cond
 
 while.cond:                                       ; preds = %while.cond, %bb.nph
-  %tmp6 = load i32* undef, align 4
+  %tmp6 = load i32, i32* undef, align 4
   %and = or i64 undef, undef
   %conv11 = zext i32 undef to i64
   %conv14 = zext i32 %tmp6 to i64
@@ -20,7 +20,7 @@ while.cond:                                       ; preds = %while.cond, %bb.nph
   %and17 = or i64 %shl15.masked, %conv11
   %add = add i64 %and17, 1
   %xor = xor i64 %add, %and
-  %tmp20 = load i64* undef, align 8
+  %tmp20 = load i64, i64* undef, align 8
   %add21 = add i64 %xor, %tmp20
   %conv22 = trunc i64 %add21 to i32
   store i32 %conv22, i32* undef, align 4
@@ -30,36 +30,20 @@ while.end:                                        ; preds = %while.cond
   ret void
 }
 
-
-; DAGCombiner shouldn't fold the sdiv (ashr) away.
-; rdar://8636812
-; CHECK: main:
-; CHECK:   sarl
-
-define i32 @main() nounwind {
-entry:
-  %i = alloca i32, align 4
-  %j = alloca i8, align 1
-  store i32 127, i32* %i, align 4
-  store i8 0, i8* %j, align 1
-  %tmp3 = load i32* %i, align 4
-  %mul = mul nsw i32 %tmp3, 2
-  %conv4 = trunc i32 %mul to i8
-  %conv5 = sext i8 %conv4 to i32
-  %div6 = sdiv i32 %conv5, 2
-  %conv7 = trunc i32 %div6 to i8
-  %conv9 = sext i8 %conv7 to i32
-  %cmp = icmp eq i32 %conv9, -1
-  br i1 %cmp, label %if.then, label %if.end
-
-if.then:                                          ; preds = %entry
-  ret i32 0
-
-if.end:                                           ; preds = %entry
-  call void @abort() noreturn
-  unreachable
+; DAG Combiner can't fold this into a load of the 1'th byte.
+; PR8757
+define i32 @test3(i32 *%P) nounwind ssp {
+  store volatile i32 128, i32* %P
+  %tmp4.pre = load i32, i32* %P
+  %phitmp = trunc i32 %tmp4.pre to i16
+  %phitmp13 = shl i16 %phitmp, 8
+  %phitmp14 = ashr i16 %phitmp13, 8
+  %phitmp15 = lshr i16 %phitmp14, 8
+  %phitmp16 = zext i16 %phitmp15 to i32
+  ret i32 %phitmp16
+  
+; CHECK: movl  $128, (%rdi)
+; CHECK-NEXT: movsbl   (%rdi), %eax
+; CHECK-NEXT: movzbl   %ah, %eax
+; CHECK-NEXT: ret
 }
-
-declare void @abort() noreturn
-
-declare void @exit(i32) noreturn