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-rw-r--r--test/passes/optimize-instructions.txt20
-rw-r--r--test/passes/optimize-instructions.wast38
2 files changed, 58 insertions, 0 deletions
diff --git a/test/passes/optimize-instructions.txt b/test/passes/optimize-instructions.txt
index 9819cb8c7..01f1070f7 100644
--- a/test/passes/optimize-instructions.txt
+++ b/test/passes/optimize-instructions.txt
@@ -1218,4 +1218,24 @@
)
)
)
+ (func $sign-ext-load (type $4) (param $0 i32) (param $1 i32)
+ (drop
+ (i32.load8_s
+ (i32.const 256)
+ )
+ )
+ (drop
+ (i32.shr_u
+ (i32.load8_s
+ (i32.const 256)
+ )
+ (i32.const 1)
+ )
+ )
+ (drop
+ (i32.load16_s
+ (i32.const 256)
+ )
+ )
+ )
)
diff --git a/test/passes/optimize-instructions.wast b/test/passes/optimize-instructions.wast
index 1f0cd9094..9cdec0a6c 100644
--- a/test/passes/optimize-instructions.wast
+++ b/test/passes/optimize-instructions.wast
@@ -1525,4 +1525,42 @@
)
)
)
+ (func $sign-ext-load (param $0 i32) (param $1 i32)
+ (drop
+ (i32.shr_s
+ (i32.shl
+ (i32.load8_s ;; one byte, so perfect
+ (i32.const 256)
+ )
+ (i32.const 24)
+ )
+ (i32.const 24)
+ )
+ )
+ (drop
+ (i32.shr_s
+ (i32.shl
+ (i32.shr_u
+ (i32.load8_s ;; one byte, but reduced to 7
+ (i32.const 256)
+ )
+ (i32.const 1)
+ )
+ (i32.const 24)
+ )
+ (i32.const 24)
+ )
+ )
+ (drop
+ (i32.shr_s
+ (i32.shl
+ (i32.load16_s ;; two, so perfect
+ (i32.const 256)
+ )
+ (i32.const 16)
+ )
+ (i32.const 16)
+ )
+ )
+ )
)