Revert r198208 and reapply:

[oota-llvm.git] / test / CodeGen / SystemZ / fp-cmp-02.ll

diff --git a/test/CodeGen/SystemZ/fp-cmp-02.ll b/test/CodeGen/SystemZ/fp-cmp-02.ll
index 8227308ce8106c1822357644c7cdf000a880b62e..c61f04ed244e3b971dfda8341a3f5031fc0940d9 100644 (file)
--- a/test/CodeGen/SystemZ/fp-cmp-02.ll
+++ b/test/CodeGen/SystemZ/fp-cmp-02.ll
@@ -1,12 +1,15 @@
-; Test 64-bit floating-point comparison.
+; Test 64-bit floating-point comparison.  The tests assume a z10 implementation
+; of select, using conditional branches rather than LOCGR.
 ;
-; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
+; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 | FileCheck %s
+
+declare double @foo()
 
 ; Check comparison with registers.
 define i64 @f1(i64 %a, i64 %b, double %f1, double %f2) {
-; CHECK: f1:
+; CHECK-LABEL: f1:
 ; CHECK: cdbr %f0, %f2
-; CHECK-NEXT: j{{g?}}e
+; CHECK-NEXT: je
 ; CHECK: lgr %r2, %r3
 ; CHECK: br %r14
   %cond = fcmp oeq double %f1, %f2
@@ -16,9 +19,9 @@ define i64 @f1(i64 %a, i64 %b, double %f1, double %f2) {
 
 ; Check the low end of the CDB range.
 define i64 @f2(i64 %a, i64 %b, double %f1, double *%ptr) {
-; CHECK: f2:
+; CHECK-LABEL: f2:
 ; CHECK: cdb %f0, 0(%r4)
-; CHECK-NEXT: j{{g?}}e
+; CHECK-NEXT: je
 ; CHECK: lgr %r2, %r3
 ; CHECK: br %r14
   %f2 = load double *%ptr
@@ -29,9 +32,9 @@ define i64 @f2(i64 %a, i64 %b, double %f1, double *%ptr) {
 
 ; Check the high end of the aligned CDB range.
 define i64 @f3(i64 %a, i64 %b, double %f1, double *%base) {
-; CHECK: f3:
+; CHECK-LABEL: f3:
 ; CHECK: cdb %f0, 4088(%r4)
-; CHECK-NEXT: j{{g?}}e
+; CHECK-NEXT: je
 ; CHECK: lgr %r2, %r3
 ; CHECK: br %r14
   %ptr = getelementptr double *%base, i64 511
@@ -44,10 +47,10 @@ define i64 @f3(i64 %a, i64 %b, double %f1, double *%base) {
 ; Check the next doubleword up, which needs separate address logic.
 ; Other sequences besides this one would be OK.
 define i64 @f4(i64 %a, i64 %b, double %f1, double *%base) {
-; CHECK: f4:
+; CHECK-LABEL: f4:
 ; CHECK: aghi %r4, 4096
 ; CHECK: cdb %f0, 0(%r4)
-; CHECK-NEXT: j{{g?}}e
+; CHECK-NEXT: je
 ; CHECK: lgr %r2, %r3
 ; CHECK: br %r14
   %ptr = getelementptr double *%base, i64 512
@@ -59,10 +62,10 @@ define i64 @f4(i64 %a, i64 %b, double %f1, double *%base) {
 
 ; Check negative displacements, which also need separate address logic.
 define i64 @f5(i64 %a, i64 %b, double %f1, double *%base) {
-; CHECK: f5:
+; CHECK-LABEL: f5:
 ; CHECK: aghi %r4, -8
 ; CHECK: cdb %f0, 0(%r4)
-; CHECK-NEXT: j{{g?}}e
+; CHECK-NEXT: je
 ; CHECK: lgr %r2, %r3
 ; CHECK: br %r14
   %ptr = getelementptr double *%base, i64 -1
@@ -74,10 +77,10 @@ define i64 @f5(i64 %a, i64 %b, double %f1, double *%base) {
 
 ; Check that CDB allows indices.
 define i64 @f6(i64 %a, i64 %b, double %f1, double *%base, i64 %index) {
-; CHECK: f6:
+; CHECK-LABEL: f6:
 ; CHECK: sllg %r1, %r5, 3
 ; CHECK: cdb %f0, 800(%r1,%r4)
-; CHECK-NEXT: j{{g?}}e
+; CHECK-NEXT: je
 ; CHECK: lgr %r2, %r3
 ; CHECK: br %r14
   %ptr1 = getelementptr double *%base, i64 %index
@@ -87,3 +90,86 @@ define i64 @f6(i64 %a, i64 %b, double %f1, double *%base, i64 %index) {
   %res = select i1 %cond, i64 %a, i64 %b
   ret i64 %res
 }
+
+; Check that comparisons of spilled values can use CDB rather than CDBR.
+define double @f7(double *%ptr0) {
+; CHECK-LABEL: f7:
+; CHECK: brasl %r14, foo@PLT
+; CHECK: cdb {{%f[0-9]+}}, 160(%r15)
+; CHECK: br %r14
+  %ptr1 = getelementptr double *%ptr0, i64 2
+  %ptr2 = getelementptr double *%ptr0, i64 4
+  %ptr3 = getelementptr double *%ptr0, i64 6
+  %ptr4 = getelementptr double *%ptr0, i64 8
+  %ptr5 = getelementptr double *%ptr0, i64 10
+  %ptr6 = getelementptr double *%ptr0, i64 12
+  %ptr7 = getelementptr double *%ptr0, i64 14
+  %ptr8 = getelementptr double *%ptr0, i64 16
+  %ptr9 = getelementptr double *%ptr0, i64 18
+  %ptr10 = getelementptr double *%ptr0, i64 20
+
+  %val0 = load double *%ptr0
+  %val1 = load double *%ptr1
+  %val2 = load double *%ptr2
+  %val3 = load double *%ptr3
+  %val4 = load double *%ptr4
+  %val5 = load double *%ptr5
+  %val6 = load double *%ptr6
+  %val7 = load double *%ptr7
+  %val8 = load double *%ptr8
+  %val9 = load double *%ptr9
+  %val10 = load double *%ptr10
+
+  %ret = call double @foo()
+
+  %cmp0 = fcmp olt double %ret, %val0
+  %cmp1 = fcmp olt double %ret, %val1
+  %cmp2 = fcmp olt double %ret, %val2
+  %cmp3 = fcmp olt double %ret, %val3
+  %cmp4 = fcmp olt double %ret, %val4
+  %cmp5 = fcmp olt double %ret, %val5
+  %cmp6 = fcmp olt double %ret, %val6
+  %cmp7 = fcmp olt double %ret, %val7
+  %cmp8 = fcmp olt double %ret, %val8
+  %cmp9 = fcmp olt double %ret, %val9
+  %cmp10 = fcmp olt double %ret, %val10
+
+  %sel0 = select i1 %cmp0, double %ret, double 0.0
+  %sel1 = select i1 %cmp1, double %sel0, double 1.0
+  %sel2 = select i1 %cmp2, double %sel1, double 2.0
+  %sel3 = select i1 %cmp3, double %sel2, double 3.0
+  %sel4 = select i1 %cmp4, double %sel3, double 4.0
+  %sel5 = select i1 %cmp5, double %sel4, double 5.0
+  %sel6 = select i1 %cmp6, double %sel5, double 6.0
+  %sel7 = select i1 %cmp7, double %sel6, double 7.0
+  %sel8 = select i1 %cmp8, double %sel7, double 8.0
+  %sel9 = select i1 %cmp9, double %sel8, double 9.0
+  %sel10 = select i1 %cmp10, double %sel9, double 10.0
+
+  ret double %sel10
+}
+
+; Check comparison with zero.
+define i64 @f8(i64 %a, i64 %b, double %f) {
+; CHECK-LABEL: f8:
+; CHECK: ltdbr %f0, %f0
+; CHECK-NEXT: je
+; CHECK: lgr %r2, %r3
+; CHECK: br %r14
+  %cond = fcmp oeq double %f, 0.0
+  %res = select i1 %cond, i64 %a, i64 %b
+  ret i64 %res
+}
+
+; Check the comparison can be reversed if that allows CDB to be used,
+define i64 @f9(i64 %a, i64 %b, double %f2, double *%ptr) {
+; CHECK-LABEL: f9:
+; CHECK: cdb %f0, 0(%r4)
+; CHECK-NEXT: jl {{\.L.*}}
+; CHECK: lgr %r2, %r3
+; CHECK: br %r14
+  %f1 = load double *%ptr
+  %cond = fcmp ogt double %f1, %f2
+  %res = select i1 %cond, i64 %a, i64 %b
+  ret i64 %res
+}