AArch64: Do not create CCMP on multiple users.

[oota-llvm.git] / test / CodeGen / AArch64 / arm64-ccmp.ll

diff --git a/test/CodeGen/AArch64/arm64-ccmp.ll b/test/CodeGen/AArch64/arm64-ccmp.ll
index 60fb74024edde51a66ada0aec81296cdf3933e07..d8ad067a1bfa4e1d1bc3faab4c71e6f11f7cea2c 100644 (file)
--- a/test/CodeGen/AArch64/arm64-ccmp.ll
+++ b/test/CodeGen/AArch64/arm64-ccmp.ll
@@ -104,11 +104,14 @@ if.end:                                           ; preds = %if.then, %lor.lhs.f
 ; Speculatively execute division by zero.
 ; The sdiv/udiv instructions do not trap when the divisor is zero, so they are
 ; safe to speculate.
-; CHECK: speculate_division
-; CHECK-NOT: cmp
-; CHECK: sdiv
-; CHECK: cmp
-; CHECK-NEXT: ccmp
+; CHECK-LABEL: speculate_division:
+; CHECK: cmp w0, #1
+; CHECK: sdiv [[DIVRES:w[0-9]+]], w1, w0
+; CHECK: ccmp [[DIVRES]], #16, #0, ge
+; CHECK: b.gt [[BLOCK:LBB[0-9_]+]]
+; CHECK: bl _foo
+; CHECK: [[BLOCK]]:
+; CHECK: orr w0, wzr, #0x7
 define i32 @speculate_division(i32 %a, i32 %b) nounwind ssp {
 entry:
   %cmp = icmp sgt i32 %a, 0
@@ -370,8 +373,8 @@ define i32 @select_ororand(i32 %w0, i32 %w1, i32 %w2, i32 %w3) {
   ret i32 %sel
 }
 
-; CHECK-LABEL: select_noccmp
-define i64 @select_noccmp(i64 %v1, i64 %v2, i64 %v3, i64 %r) {
+; CHECK-LABEL: select_noccmp1
+define i64 @select_noccmp1(i64 %v1, i64 %v2, i64 %v3, i64 %r) {
 ; CHECK-NOT: CCMP
   %c0 = icmp slt i64 %v1, 0
   %c1 = icmp sgt i64 %v1, 13
@@ -383,3 +386,19 @@ define i64 @select_noccmp(i64 %v1, i64 %v2, i64 %v3, i64 %r) {
   %sel = select i1 %or, i64 0, i64 %r
   ret i64 %sel
 }
+
+@g = global i32 0
+
+; Should not use ccmp if we have to compute the or expression in an integer
+; register anyway because of other users.
+; CHECK-LABEL: select_noccmp2
+define i64 @select_noccmp2(i64 %v1, i64 %v2, i64 %v3, i64 %r) {
+; CHECK-NOT: CCMP
+  %c0 = icmp slt i64 %v1, 0
+  %c1 = icmp sgt i64 %v1, 13
+  %or = or i1 %c0, %c1
+  %sel = select i1 %or, i64 0, i64 %r
+  %ext = sext i1 %or to i32
+  store volatile i32 %ext, i32* @g
+  ret i64 %sel
+}