1 files changed, 213 insertions, 0 deletions
diff --git a/test/CodeGen/SystemZ/cond-store-05.ll b/test/CodeGen/SystemZ/cond-store-05.ll
new file mode 100644
index 000000000000..f8056f73c928
--- /dev/null
+++ b/test/CodeGen/SystemZ/cond-store-05.ll
@@ -0,0 +1,213 @@
+; Test f32 conditional stores that are presented as selects.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
+
+declare void @foo(float *)
+
+; Test with the loaded value first.
+define void @f1(float *%ptr, float %alt, i32 %limit) {
+; CHECK-LABEL: f1:
+; CHECK-NOT: %r2
+; CHECK: jl [[LABEL:[^ ]*]]
+; CHECK-NOT: %r2
+; CHECK: ste %f0, 0(%r2)
+; CHECK: [[LABEL]]:
+; CHECK: br %r14
+  %cond = icmp ult i32 %limit, 420
+  %orig = load float *%ptr
+  %res = select i1 %cond, float %orig, float %alt
+  store float %res, float *%ptr
+  ret void
+}
+
+; ...and with the loaded value second
+define void @f2(float *%ptr, float %alt, i32 %limit) {
+; CHECK-LABEL: f2:
+; CHECK-NOT: %r2
+; CHECK: jhe [[LABEL:[^ ]*]]
+; CHECK-NOT: %r2
+; CHECK: ste %f0, 0(%r2)
+; CHECK: [[LABEL]]:
+; CHECK: br %r14
+  %cond = icmp ult i32 %limit, 420
+  %orig = load float *%ptr
+  %res = select i1 %cond, float %alt, float %orig
+  store float %res, float *%ptr
+  ret void
+}
+
+; Check the high end of the aligned STE range.
+define void @f3(float *%base, float %alt, i32 %limit) {
+; CHECK-LABEL: f3:
+; CHECK-NOT: %r2
+; CHECK: jl [[LABEL:[^ ]*]]
+; CHECK-NOT: %r2
+; CHECK: ste %f0, 4092(%r2)
+; CHECK: [[LABEL]]:
+; CHECK: br %r14
+  %ptr = getelementptr float *%base, i64 1023
+  %cond = icmp ult i32 %limit, 420
+  %orig = load float *%ptr
+  %res = select i1 %cond, float %orig, float %alt
+  store float %res, float *%ptr
+  ret void
+}
+
+; Check the next word up, which should use STEY instead of STE.
+define void @f4(float *%base, float %alt, i32 %limit) {
+; CHECK-LABEL: f4:
+; CHECK-NOT: %r2
+; CHECK: jl [[LABEL:[^ ]*]]
+; CHECK-NOT: %r2
+; CHECK: stey %f0, 4096(%r2)
+; CHECK: [[LABEL]]:
+; CHECK: br %r14
+  %ptr = getelementptr float *%base, i64 1024
+  %cond = icmp ult i32 %limit, 420
+  %orig = load float *%ptr
+  %res = select i1 %cond, float %orig, float %alt
+  store float %res, float *%ptr
+  ret void
+}
+
+; Check the high end of the aligned STEY range.
+define void @f5(float *%base, float %alt, i32 %limit) {
+; CHECK-LABEL: f5:
+; CHECK-NOT: %r2
+; CHECK: jl [[LABEL:[^ ]*]]
+; CHECK-NOT: %r2
+; CHECK: stey %f0, 524284(%r2)
+; CHECK: [[LABEL]]:
+; CHECK: br %r14
+  %ptr = getelementptr float *%base, i64 131071
+  %cond = icmp ult i32 %limit, 420
+  %orig = load float *%ptr
+  %res = select i1 %cond, float %orig, float %alt
+  store float %res, float *%ptr
+  ret void
+}
+
+; Check the next word up, which needs separate address logic.
+; Other sequences besides this one would be OK.
+define void @f6(float *%base, float %alt, i32 %limit) {
+; CHECK-LABEL: f6:
+; CHECK-NOT: %r2
+; CHECK: jl [[LABEL:[^ ]*]]
+; CHECK-NOT: %r2
+; CHECK: agfi %r2, 524288
+; CHECK: ste %f0, 0(%r2)
+; CHECK: [[LABEL]]:
+; CHECK: br %r14
+  %ptr = getelementptr float *%base, i64 131072
+  %cond = icmp ult i32 %limit, 420
+  %orig = load float *%ptr
+  %res = select i1 %cond, float %orig, float %alt
+  store float %res, float *%ptr
+  ret void
+}
+
+; Check the low end of the STEY range.
+define void @f7(float *%base, float %alt, i32 %limit) {
+; CHECK-LABEL: f7:
+; CHECK-NOT: %r2
+; CHECK: jl [[LABEL:[^ ]*]]
+; CHECK-NOT: %r2
+; CHECK: stey %f0, -524288(%r2)
+; CHECK: [[LABEL]]:
+; CHECK: br %r14
+  %ptr = getelementptr float *%base, i64 -131072
+  %cond = icmp ult i32 %limit, 420
+  %orig = load float *%ptr
+  %res = select i1 %cond, float %orig, float %alt
+  store float %res, float *%ptr
+  ret void
+}
+
+; Check the next word down, which needs separate address logic.
+; Other sequences besides this one would be OK.
+define void @f8(float *%base, float %alt, i32 %limit) {
+; CHECK-LABEL: f8:
+; CHECK-NOT: %r2
+; CHECK: jl [[LABEL:[^ ]*]]
+; CHECK-NOT: %r2
+; CHECK: agfi %r2, -524292
+; CHECK: ste %f0, 0(%r2)
+; CHECK: [[LABEL]]:
+; CHECK: br %r14
+  %ptr = getelementptr float *%base, i64 -131073
+  %cond = icmp ult i32 %limit, 420
+  %orig = load float *%ptr
+  %res = select i1 %cond, float %orig, float %alt
+  store float %res, float *%ptr
+  ret void
+}
+
+; Check that STEY allows an index.
+define void @f9(i64 %base, i64 %index, float %alt, i32 %limit) {
+; CHECK-LABEL: f9:
+; CHECK-NOT: %r2
+; CHECK: jl [[LABEL:[^ ]*]]
+; CHECK-NOT: %r2
+; CHECK: stey %f0, 4096(%r3,%r2)
+; CHECK: [[LABEL]]:
+; CHECK: br %r14
+  %add1 = add i64 %base, %index
+  %add2 = add i64 %add1, 4096
+  %ptr = inttoptr i64 %add2 to float *
+  %cond = icmp ult i32 %limit, 420
+  %orig = load float *%ptr
+  %res = select i1 %cond, float %orig, float %alt
+  store float %res, float *%ptr
+  ret void
+}
+
+; Check that volatile loads are not matched.
+define void @f10(float *%ptr, float %alt, i32 %limit) {
+; CHECK-LABEL: f10:
+; CHECK: le {{%f[0-5]}}, 0(%r2)
+; CHECK: {{jl|jnl}} [[LABEL:[^ ]*]]
+; CHECK: [[LABEL]]:
+; CHECK: ste {{%f[0-5]}}, 0(%r2)
+; CHECK: br %r14
+  %cond = icmp ult i32 %limit, 420
+  %orig = load volatile float *%ptr
+  %res = select i1 %cond, float %orig, float %alt
+  store float %res, float *%ptr
+  ret void
+}
+
+; ...likewise stores.  In this case we should have a conditional load into %f0.
+define void @f11(float *%ptr, float %alt, i32 %limit) {
+; CHECK-LABEL: f11:
+; CHECK: jhe [[LABEL:[^ ]*]]
+; CHECK: le %f0, 0(%r2)
+; CHECK: [[LABEL]]:
+; CHECK: ste %f0, 0(%r2)
+; CHECK: br %r14
+  %cond = icmp ult i32 %limit, 420
+  %orig = load float *%ptr
+  %res = select i1 %cond, float %orig, float %alt
+  store volatile float %res, float *%ptr
+  ret void
+}
+
+; Try a frame index base.
+define void @f12(float %alt, i32 %limit) {
+; CHECK-LABEL: f12:
+; CHECK: brasl %r14, foo@PLT
+; CHECK-NOT: %r15
+; CHECK: jl [[LABEL:[^ ]*]]
+; CHECK-NOT: %r15
+; CHECK: ste {{%f[0-9]+}}, {{[0-9]+}}(%r15)
+; CHECK: [[LABEL]]:
+; CHECK: brasl %r14, foo@PLT
+; CHECK: br %r14
+  %ptr = alloca float
+  call void @foo(float *%ptr)
+  %cond = icmp ult i32 %limit, 420
+  %orig = load float *%ptr
+  %res = select i1 %cond, float %orig, float %alt
+  store float %res, float *%ptr
+  call void @foo(float *%ptr)
+  ret void
+}