1 files changed, 213 insertions, 0 deletions
diff --git a/test/CodeGen/SystemZ/cond-store-06.ll b/test/CodeGen/SystemZ/cond-store-06.ll
new file mode 100644
index 0000000..203a0b0
--- /dev/null
+++ b/test/CodeGen/SystemZ/cond-store-06.ll
@@ -0,0 +1,213 @@
+; Test f64 conditional stores that are presented as selects.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
+
+declare void @foo(double *)
+
+; Test with the loaded value first.
+define void @f1(double *%ptr, double %alt, i32 %limit) {
+; CHECK: f1:
+; CHECK-NOT: %r2
+; CHECK: jl [[LABEL:[^ ]*]]
+; CHECK-NOT: %r2
+; CHECK: std %f0, 0(%r2)
+; CHECK: [[LABEL]]:
+; CHECK: br %r14
+  %cond = icmp ult i32 %limit, 42
+  %orig = load double *%ptr
+  %res = select i1 %cond, double %orig, double %alt
+  store double %res, double *%ptr
+  ret void
+}
+
+; ...and with the loaded value second
+define void @f2(double *%ptr, double %alt, i32 %limit) {
+; CHECK: f2:
+; CHECK-NOT: %r2
+; CHECK: jnl [[LABEL:[^ ]*]]
+; CHECK-NOT: %r2
+; CHECK: std %f0, 0(%r2)
+; CHECK: [[LABEL]]:
+; CHECK: br %r14
+  %cond = icmp ult i32 %limit, 42
+  %orig = load double *%ptr
+  %res = select i1 %cond, double %alt, double %orig
+  store double %res, double *%ptr
+  ret void
+}
+
+; Check the high end of the aligned STD range.
+define void @f3(double *%base, double %alt, i32 %limit) {
+; CHECK: f3:
+; CHECK-NOT: %r2
+; CHECK: jl [[LABEL:[^ ]*]]
+; CHECK-NOT: %r2
+; CHECK: std %f0, 4088(%r2)
+; CHECK: [[LABEL]]:
+; CHECK: br %r14
+  %ptr = getelementptr double *%base, i64 511
+  %cond = icmp ult i32 %limit, 42
+  %orig = load double *%ptr
+  %res = select i1 %cond, double %orig, double %alt
+  store double %res, double *%ptr
+  ret void
+}
+
+; Check the next doubleword up, which should use STDY instead of STD.
+define void @f4(double *%base, double %alt, i32 %limit) {
+; CHECK: f4:
+; CHECK-NOT: %r2
+; CHECK: jl [[LABEL:[^ ]*]]
+; CHECK-NOT: %r2
+; CHECK: stdy %f0, 4096(%r2)
+; CHECK: [[LABEL]]:
+; CHECK: br %r14
+  %ptr = getelementptr double *%base, i64 512
+  %cond = icmp ult i32 %limit, 42
+  %orig = load double *%ptr
+  %res = select i1 %cond, double %orig, double %alt
+  store double %res, double *%ptr
+  ret void
+}
+
+; Check the high end of the aligned STDY range.
+define void @f5(double *%base, double %alt, i32 %limit) {
+; CHECK: f5:
+; CHECK-NOT: %r2
+; CHECK: jl [[LABEL:[^ ]*]]
+; CHECK-NOT: %r2
+; CHECK: stdy %f0, 524280(%r2)
+; CHECK: [[LABEL]]:
+; CHECK: br %r14
+  %ptr = getelementptr double *%base, i64 65535
+  %cond = icmp ult i32 %limit, 42
+  %orig = load double *%ptr
+  %res = select i1 %cond, double %orig, double %alt
+  store double %res, double *%ptr
+  ret void
+}
+
+; Check the next doubleword up, which needs separate address logic.
+; Other sequences besides this one would be OK.
+define void @f6(double *%base, double %alt, i32 %limit) {
+; CHECK: f6:
+; CHECK-NOT: %r2
+; CHECK: jl [[LABEL:[^ ]*]]
+; CHECK-NOT: %r2
+; CHECK: agfi %r2, 524288
+; CHECK: std %f0, 0(%r2)
+; CHECK: [[LABEL]]:
+; CHECK: br %r14
+  %ptr = getelementptr double *%base, i64 65536
+  %cond = icmp ult i32 %limit, 42
+  %orig = load double *%ptr
+  %res = select i1 %cond, double %orig, double %alt
+  store double %res, double *%ptr
+  ret void
+}
+
+; Check the low end of the STDY range.
+define void @f7(double *%base, double %alt, i32 %limit) {
+; CHECK: f7:
+; CHECK-NOT: %r2
+; CHECK: jl [[LABEL:[^ ]*]]
+; CHECK-NOT: %r2
+; CHECK: stdy %f0, -524288(%r2)
+; CHECK: [[LABEL]]:
+; CHECK: br %r14
+  %ptr = getelementptr double *%base, i64 -65536
+  %cond = icmp ult i32 %limit, 42
+  %orig = load double *%ptr
+  %res = select i1 %cond, double %orig, double %alt
+  store double %res, double *%ptr
+  ret void
+}
+
+; Check the next doubleword down, which needs separate address logic.
+; Other sequences besides this one would be OK.
+define void @f8(double *%base, double %alt, i32 %limit) {
+; CHECK: f8:
+; CHECK-NOT: %r2
+; CHECK: jl [[LABEL:[^ ]*]]
+; CHECK-NOT: %r2
+; CHECK: agfi %r2, -524296
+; CHECK: std %f0, 0(%r2)
+; CHECK: [[LABEL]]:
+; CHECK: br %r14
+  %ptr = getelementptr double *%base, i64 -65537
+  %cond = icmp ult i32 %limit, 42
+  %orig = load double *%ptr
+  %res = select i1 %cond, double %orig, double %alt
+  store double %res, double *%ptr
+  ret void
+}
+
+; Check that STDY allows an index.
+define void @f9(i64 %base, i64 %index, double %alt, i32 %limit) {
+; CHECK: f9:
+; CHECK-NOT: %r2
+; CHECK: jl [[LABEL:[^ ]*]]
+; CHECK-NOT: %r2
+; CHECK: stdy %f0, 524287(%r3,%r2)
+; CHECK: [[LABEL]]:
+; CHECK: br %r14
+  %add1 = add i64 %base, %index
+  %add2 = add i64 %add1, 524287
+  %ptr = inttoptr i64 %add2 to double *
+  %cond = icmp ult i32 %limit, 42
+  %orig = load double *%ptr
+  %res = select i1 %cond, double %orig, double %alt
+  store double %res, double *%ptr
+  ret void
+}
+
+; Check that volatile loads are not matched.
+define void @f10(double *%ptr, double %alt, i32 %limit) {
+; CHECK: f10:
+; CHECK: ld {{%f[0-5]}}, 0(%r2)
+; CHECK: {{jl|jnl}} [[LABEL:[^ ]*]]
+; CHECK: [[LABEL]]:
+; CHECK: std {{%f[0-5]}}, 0(%r2)
+; CHECK: br %r14
+  %cond = icmp ult i32 %limit, 42
+  %orig = load volatile double *%ptr
+  %res = select i1 %cond, double %orig, double %alt
+  store double %res, double *%ptr
+  ret void
+}
+
+; ...likewise stores.  In this case we should have a conditional load into %f0.
+define void @f11(double *%ptr, double %alt, i32 %limit) {
+; CHECK: f11:
+; CHECK: jnl [[LABEL:[^ ]*]]
+; CHECK: ld %f0, 0(%r2)
+; CHECK: [[LABEL]]:
+; CHECK: std %f0, 0(%r2)
+; CHECK: br %r14
+  %cond = icmp ult i32 %limit, 42
+  %orig = load double *%ptr
+  %res = select i1 %cond, double %orig, double %alt
+  store volatile double %res, double *%ptr
+  ret void
+}
+
+; Try a frame index base.
+define void @f12(double %alt, i32 %limit) {
+; CHECK: f12:
+; CHECK: brasl %r14, foo@PLT
+; CHECK-NOT: %r15
+; CHECK: jl [[LABEL:[^ ]*]]
+; CHECK-NOT: %r15
+; CHECK: std {{%f[0-9]+}}, {{[0-9]+}}(%r15)
+; CHECK: [[LABEL]]:
+; CHECK: brasl %r14, foo@PLT
+; CHECK: br %r14
+  %ptr = alloca double
+  call void @foo(double *%ptr)
+  %cond = icmp ult i32 %limit, 42
+  %orig = load double *%ptr
+  %res = select i1 %cond, double %orig, double %alt
+  store double %res, double *%ptr
+  call void @foo(double *%ptr)
+  ret void
+}