[SystemZ] Add CodeGen test cases

This adds all CodeGen tests for the SystemZ target.

This version of the patch incorporates feedback from a review by
Sean Silva.  Thanks to all reviewers!

Patch by Richard Sandiford.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181204 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 128 insertions, 0 deletions

diff --git a/test/CodeGen/SystemZ/fp-copysign-01.ll b/test/CodeGen/SystemZ/fp-copysign-01.ll
new file mode 100644
index 0000000000..458d475bdf
--- /dev/null
+++ b/test/CodeGen/SystemZ/fp-copysign-01.ll
@@ -0,0 +1,128 @@
+; Test copysign operations.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
+
+declare float @copysignf(float, float) readnone
+declare double @copysign(double, double) readnone
+; FIXME: not really the correct prototype for SystemZ.
+declare fp128 @copysignl(fp128, fp128) readnone
+
+; Test f32 copies in which the sign comes from an f32.
+define float @f1(float %a, float %b) {
+; CHECK: f1:
+; CHECK-NOT: %f2
+; CHECK: cpsdr %f0, %f0, %f2
+; CHECK: br %r14
+  %res = call float @copysignf(float %a, float %b) readnone
+  ret float %res
+}
+
+; Test f32 copies in which the sign comes from an f64.
+define float @f2(float %a, double %bd) {
+; CHECK: f2:
+; CHECK-NOT: %f2
+; CHECK: cpsdr %f0, %f0, %f2
+; CHECK: br %r14
+  %b = fptrunc double %bd to float
+  %res = call float @copysignf(float %a, float %b) readnone
+  ret float %res
+}
+
+; Test f32 copies in which the sign comes from an f128.
+define float @f3(float %a, fp128 *%bptr) {
+; CHECK: f3:
+; CHECK: ld [[BHIGH:%f[0-7]]], 0(%r2)
+; CHECK: ld [[BLOW:%f[0-7]]], 8(%r2)
+; CHECK: cpsdr %f0, %f0, [[BHIGH]]
+; CHECK: br %r14
+  %bl = load volatile fp128 *%bptr
+  %b = fptrunc fp128 %bl to float
+  %res = call float @copysignf(float %a, float %b) readnone
+  ret float %res
+}
+
+; Test f64 copies in which the sign comes from an f32.
+define double @f4(double %a, float %bf) {
+; CHECK: f4:
+; CHECK-NOT: %f2
+; CHECK: cpsdr %f0, %f0, %f2
+; CHECK: br %r14
+  %b = fpext float %bf to double
+  %res = call double @copysign(double %a, double %b) readnone
+  ret double %res
+}
+
+; Test f64 copies in which the sign comes from an f64.
+define double @f5(double %a, double %b) {
+; CHECK: f5:
+; CHECK-NOT: %f2
+; CHECK: cpsdr %f0, %f0, %f2
+; CHECK: br %r14
+  %res = call double @copysign(double %a, double %b) readnone
+  ret double %res
+}
+
+; Test f64 copies in which the sign comes from an f128.
+define double @f6(double %a, fp128 *%bptr) {
+; CHECK: f6:
+; CHECK: ld [[BHIGH:%f[0-7]]], 0(%r2)
+; CHECK: ld [[BLOW:%f[0-7]]], 8(%r2)
+; CHECK: cpsdr %f0, %f0, [[BHIGH]]
+; CHECK: br %r14
+  %bl = load volatile fp128 *%bptr
+  %b = fptrunc fp128 %bl to double
+  %res = call double @copysign(double %a, double %b) readnone
+  ret double %res
+}
+
+; Test f128 copies in which the sign comes from an f32.  We shouldn't
+; need any register shuffling here; %a should be tied to %c, with CPSDR
+; just changing the high register.
+define void @f7(fp128 *%cptr, fp128 *%aptr, float %bf) {
+; CHECK: f7:
+; CHECK: ld [[AHIGH:%f[0-7]]], 0(%r3)
+; CHECK: ld [[ALOW:%f[0-7]]], 8(%r3)
+; CHECK: cpsdr [[AHIGH]], [[AHIGH]], %f0
+; CHECK: std [[AHIGH]], 0(%r2)
+; CHECK: std [[ALOW]], 8(%r2)
+; CHECK: br %r14
+  %a = load volatile fp128 *%aptr
+  %b = fpext float %bf to fp128
+  %c = call fp128 @copysignl(fp128 %a, fp128 %b) readnone
+  store fp128 %c, fp128 *%cptr
+  ret void
+}
+
+; As above, but the sign comes from an f64.
+define void @f8(fp128 *%cptr, fp128 *%aptr, double %bd) {
+; CHECK: f8:
+; CHECK: ld [[AHIGH:%f[0-7]]], 0(%r3)
+; CHECK: ld [[ALOW:%f[0-7]]], 8(%r3)
+; CHECK: cpsdr [[AHIGH]], [[AHIGH]], %f0
+; CHECK: std [[AHIGH]], 0(%r2)
+; CHECK: std [[ALOW]], 8(%r2)
+; CHECK: br %r14
+  %a = load volatile fp128 *%aptr
+  %b = fpext double %bd to fp128
+  %c = call fp128 @copysignl(fp128 %a, fp128 %b) readnone
+  store fp128 %c, fp128 *%cptr
+  ret void
+}
+
+; As above, but the sign comes from an f128.  Don't require the low part
+; of %b to be loaded, since it isn't used.
+define void @f9(fp128 *%cptr, fp128 *%aptr, fp128 *%bptr) {
+; CHECK: f9:
+; CHECK: ld [[AHIGH:%f[0-7]]], 0(%r3)
+; CHECK: ld [[ALOW:%f[0-7]]], 8(%r3)
+; CHECK: ld [[BHIGH:%f[0-7]]], 0(%r4)
+; CHECK: cpsdr [[AHIGH]], [[AHIGH]], [[BHIGH]]
+; CHECK: std [[AHIGH]], 0(%r2)
+; CHECK: std [[ALOW]], 8(%r2)
+; CHECK: br %r14
+  %a = load volatile fp128 *%aptr
+  %b = load volatile fp128 *%bptr
+  %c = call fp128 @copysignl(fp128 %a, fp128 %b) readnone
+  store fp128 %c, fp128 *%cptr
+  ret void
+}